IP Library › Granted Patent US 12,366,400
Granted Patent B2
US 12,366,400 · App. 17/687,382 · Granted Jul 22, 2025

Shipping system for storing and/or transporting temperature-sensitive materials

Inventors: James R. Chasteen (Ann Arbor, MI); Theodore Smith (Watertown, MA)
Assignee: COLD CHAIN TECHNOLOGIES, LLC
F25D11/003B65B5/06B65B55/00B65D81/107B65D81/3818B65D81/3823
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Quick Facts
Patent No.
US 12,366,400
App. No.
17/687,382
Granted
Jul 22, 2025
Kind
B2
Abstract

Method and system are designed for storing and/or transporting temperature-sensitive materials. The system is designed to keep a payload within a desired temperature range of +2° C. to +8° C. for an extended time in a warm ambient environment. The system includes a thermally insulated container and first and second phase-change materials, each of the phase-change materials having a different solid/liquid phase-change temperature. Both phase-change materials are preconditioned to a solid state for pack-out. The first phase-change material has a solid/liquid phase-change temperature that is within the desired temperature range and that is at or below a hibernation temperature of about +5° C. to +6° C. The second phase-change material has a solid/liquid phase-change temperature that is above the hibernation temperature. When placed in the warm ambient environment, both phase-change materials move towards melting; however, when subsequently placed in hibernation, the second phase-change material reverses the direction of its phase change, becoming recharged.

Claims (50)

1. A passive temperature-control shipping system for use in keeping a payload within a desired temperature range of about +2° C. to +8° C. for a period of time while exposed to an ambient environment warmer than the desired temperature range, the passive temperature-control shipping system comprising:

(a) one or more thermal insulation members arranged to at least partially bound a space;

(b) a first phase-change material associated with the one or more thermal insulation members, the first phase-change material having a phase-change temperature that is within the desired temperature range and that is at or below a refrigerating hibernation temperature, the refrigerating hibernation temperature being within the desired temperature range; and

(c) a second phase-change material associated with the one or more thermal insulation members, the second phase-change material being physically discrete from the first phase-change material and having a phase-change temperature that is different than that of the first phase-change material and that is above the refrigerating hibernation temperature;

(d) wherein both the first phase-change material and the second phase-change material are preconditioned to be in a solid phase at pack-out and wherein both the first phase-change material and the second phase-change material are in a liquid phase when at equilibrium with the ambient environment, whereby, by hibernating the passive temperature-control shipping system at the refrigerating hibernation temperature after the first and second phase-change materials have at least partially melted, the second phase-change material at least partially refreezes whereas the first phase-change material continues to melt or stops changing phase.

2. The passive temperature-control shipping system as claimed in claim 1 wherein the phase-change temperature of the first phase-change material is about +5° C. and wherein the refrigerating hibernation temperature is approximately +5° C. to +6° C.

3. The passive temperature-control shipping system as claimed in claim 2 wherein the phase-change temperature of the second phase-change material is within the desired temperature range.

4. The passive temperature-control shipping system as claimed in claim 3 wherein the phase-change temperature of the second phase-change material is about +7° C.

5. The passive temperature-control shipping system as claimed in claim 4 wherein the first phase change material and the second phase change material are preconditioned to the solid phase in a first step at a temperature of minus 20° C. and then in a second step at a temperature of +3° C.

6. The passive temperature-control shipping system as claimed in claim 4 wherein the first phase-change material and the second phase-change material are arranged in different planes, with the first phase-change material more proximal to the payload and with the second phase-change material more distal to the payload.

7. The passive temperature-control shipping system as claimed in claim 6 wherein the first phase-change material is present in a greater mass and the second phase-change material is present in a lesser mass.

8. The passive temperature-control shipping system as claimed in claim 7 wherein the first phase-change material and the second phase-change material are present in a 3:1 ratio by mass.

9. The passive temperature-control shipping system as claimed in claim 1 wherein the first phase-change material and the second phase-change material are arranged coplanar.

10. The passive temperature-control shipping system as claimed in claim 1 wherein the first phase-change material and the second phase-change material are arranged in different planes.

11. The passive temperature-control shipping system as claimed in claim 1 wherein the first phase-change material and the second phase-change material are present in equal quantities.

12. The passive temperature-control shipping system as claimed in claim 1 wherein the first phase-change material and the second phase-change material are present in unequal quantities.

13. The passive temperature-control shipping system as claimed in claim 1 wherein the passive temperature-control shipping system is pallet-sized.

14. The passive temperature-control shipping system as claimed in claim 1 wherein the passive temperature-control shipping system is parcel-sized.

15. The passive temperature-control shipping system as claimed in claim 1 wherein the passive temperature-control shipping system is a pallet cover.

16. A passive temperature-control shipping system for use in keeping a payload within a desired temperature range of about +15° C. to +25° C. for a period of time while exposed to an ambient environment warmer than the desired temperature range, the passive temperature-control shipping system comprising:

one or more thermal insulation members arranged to at least partially bound a space;

a first phase-change material associated with the one or more thermal insulation members, the first phase-change material having a phase-change temperature that is within the desired temperature range; and

a second phase-change material associated with the one or more thermal insulation members, the second phase-change material being physically discrete from the first phase-change material and having a phase-change temperature that is different than that of the first phase-change material;

wherein, at pack-out, both the first phase-change material and the second phase-change material are in a first phase that is different from a second phase in which the first and second phase-change materials exist when at equilibrium with the ambient environment, wherein the phase-change temperature of one of the first phase-change material and the second phase-change material is at or below a hibernation temperature, the hibernation temperature being within the desired temperature range, and the phase-change temperature of the other of the first phase-change material and the second phase-change material is above the hibernation temperature, whereby, by hibernating the passive temperature-control shipping system at the hibernation temperature after the first and second phase-change materials have at least partially changed from the first phase to the second phase, the second phase-change material at least partially changes back to the first phase whereas the first phase-change material continues to change to the second phase or stops changing phase.

17. A method of transporting and/or storing a payload comprising a temperature-sensitive material, the method comprising the steps of:

(a) providing the passive temperature-control shipping system of claim 1 ;

(b) loading a payload into the passive temperature-control shipping system while both the first phase-change material and the second phase-change material are in the solid phase; and

(c) then, subjecting the passive temperature-control shipping system to the ambient environment warmer than the desired temperature range until the first phase-change material and the second phase-change material at least partially melt.

18. The method as claimed in claim 17 further comprising the step of transporting the passive temperature-control shipping system.

19. The method as claimed in claim 17 further comprising, after step (c), hibernating the passive temperature-control shipping system at the refrigerating hibernating temperature until the second phase-change material at least partially refreezes whereas the first phase-change material continues to melt or stops changing phase.

20. The method as claimed in claim 19 further comprising, after the hibernating step, again subjecting the passive temperature-control shipping system to the ambient environment warmer than the desired temperature range.

21. The method as claimed in claim 17 wherein the phase-change temperature of the first phase-change material is about +5° C.

22. The method as claimed in claim 21 wherein the phase-change temperature of the second phase-change material is within the desired temperature range.

23. The method as claimed in claim 22 wherein the phase-change temperature of the second phase-change material is about +7° C.

24. The method as claimed in claim 23 wherein the first phase change material and the second phase change material are preconditioned to the solid phase in a first step at a temperature of minus 20° C. and then in a second step at a temperature of +3° C.

25. The method as claimed in claim 23 wherein the first phase-change material and the second phase-change material are arranged in different planes, with the first phase-change material more proximal to the payload and with the second phase-change material more distal to the payload.

26. The method as claimed in claim 25 wherein the first phase-change material is present in a greater mass and the second phase-change material is present in a lesser mass.

27. The method as claimed in claim 26 wherein the first phase-change material and the second phase-change material are present in a 3:1 ratio by mass.

28. A method of transporting and/or storing a payload comprising a temperature-sensitive material, the method comprising the steps of:

(a) providing one or more thermal insulating members;

(b) providing a first phase-change material, the first phase-change material having a phase-change temperature that is within a range of about +2° C. to +8° C. and that is at or below a refrigerating hibernation temperature, the refrigerating hibernation temperature being within the range of about +2° C. to +8° C.;

(c) providing a second phase-change material, the second phase-change material having a phase-change temperature that is greater than that of the first phase-change material and that is above the refrigerating hibernation temperature;

(d) conditioning both the first phase-change material and the second phase-change material at a temperature at which both are in a solid phase;

(e) associating the first phase-change material and the second phase-change material with the one or more thermal insulation members to form a system having a payload space;

(f) loading the payload into the payload space while the first phase change material and the second phase change material are solid;

(g) then, subjecting the system to an ambient environment that is warmer than +8° C. until the first phase-change material and the second phase-change material at least partially melt; and

(h) then, hibernating the system at the refrigerating hibernation temperature until the second phase-change material at least partially refreezes whereas the first phase-change material continues to melt or stops changing phase.

29. The method as claimed in claim 28 further comprising, after the hibernating step, once again subjecting the system to the ambient environment that is warmer than +8° C.

30. The method as claimed in claim 29 wherein the phase-change temperature of the first phase-change material is about +5° C., wherein the phase-change temperature of the second phase-change material is about +7° C., and wherein the refrigerating hibernation temperature is approximately +5° C. to +6° C.

31. The method as claimed in claim 28 wherein the conditioning step comprising subjecting the first phase change material and the second phase change material to a first conditioning temperature of minus 20° C. and then to a second conditioning temperature of +3° C.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 24, 2024
From: CHASTEEN, JAMES R.; SMITH, THEODORE
To: COLD CHAIN TECHNOLOGIES, LLC
Reel/Frame 068673/0864 →
Continuity (2)
Provisional Application 63156855 · Mar 4, 2021
Related Publication 20220333840A1 · Oct 20, 2022
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