IP Library › Granted Patent US 12,186,713
Granted Patent B2
US 12,186,713 · App. 16/631,572 · Granted Jan 7, 2025

Non-woven fiber membranes

Inventors: William Cataldo (Bradford, MA); Inga Elkina (Wilmington, MA); Kamran Beyzavi (Livingston, GB); Thomas Fitzgerald (Killarney, IE); Dennis Aquino (Chelmsford, MA); Daniel Callahan (Acton, MA); Michael Mansfield (Bedford, MA); Mikhail Kozlov (Lexington, MA); Gabriel Tkacik (Bedford, MA); Murugan Rajendiran (Carrigtwohill, IE); Ramesh Babu Padamati (Dublin, IE)
Assignees: Merck Millipore Ltd.; The Provost Fellows Foundation Scholars and the Other Members of Board of the College of the Holy Cross
B01D71/4011B01D69/107D01D5/003D04H1/728G01N33/54388B01D39/1623B01D2239/025B01D2239/0631B01D2239/1233B01D2323/39
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Quick Facts
Patent No.
US 12,186,713
App. No.
16/631,572
Granted
Jan 7, 2025
Kind
B2
Abstract

Provided herein are electrospun or electroblown non-woven fiber membranes, methods of making such membranes and lateral flow diagnostic devices comprising such membranes.

Claims (23)

1. A non-woven fiber membrane comprising nanofibers comprising a polymer blend of polymethylmethacrylate (PMMA) and poly(vinylidene difluoride) (PVDF), having an average fiber diameter from 200 nm to 1000 nm, wherein the membrane has a mean flow pore diameter of greater than about 1 micron to about 5 microns and a porosity of at least 80% and wherein said membrane is located in an assay developing region within a lateral flow diagnostic device.

2. The non-woven fiber membrane of claim 1 , wherein the non-woven fiber membrane is generated by electrospinning.

3. The non-woven fiber membrane of claim 1 , wherein the non-woven fiber membrane is generated by electroblowing.

4. The non-woven fiber membrane of claim 1 , wherein the mean flow pore diameter is about or greater than about 2 microns.

5. The non-woven fiber membrane of claim 1 , wherein the porosity is at least 85%.

6. The non-woven fiber membrane of claim 1 , wherein the blend of PMMA and PVDF has the weight ratio of PMMA to PVDF from 1:99 to 99:1.

7. The non-woven fiber membrane of claim 6 , wherein the ratio of PMMA to PVDF is 10:90, 15:85, 20:80, 25:75, 30:70, 35:65, 40:60, 45:55, 50:50, 55:45, 60:40, 65:35, 70:30, 75:25, 80:20, 85:15, or 90:10.

8. The non-woven fiber membrane of claim 1 , comprising nanofibers having an average fiber diameter of about: 500 nm, 550 nm, 600 nm, 650 nm, 700 nm, 750 nm, 800 nm, 850 nm, 900 nm, 950 nm, or 1000 nm.

9. The non-woven fiber membrane of claim 1 , having a mean flow pore diameter of at least: 1.0 microns, 1.5 microns, 1.75 microns, 2.0 microns, 2.25 microns, 2.5 microns, 2.75 microns, 3.0 microns, 3.5 microns, or 4.0 microns.

10. The non-woven fiber membrane of claim 1 , said non-woven fiber membrane having pores, wherein at least 90% of pores have a diameter of between 2.75 microns and 3.25 microns.

11. The non-woven fiber membrane of claim 10 , wherein at least 95% of pores have a diameter of between 2.75 microns and 3.25 microns.

12. The non-woven fiber membrane of claim 11 , wherein at least 99% of pores have a diameter of between 2.75 microns and 3.25 microns.

13. The non-woven fiber membrane of claim 1 , said non-woven fiber membrane having a thickness of from 25 to 250 microns.

14. The non-woven fiber membrane of claim 13 , said non-woven fiber membrane having a thickness of from 100 to 175 microns.

15. The non-woven fiber membrane of claim 13 , said non-woven fiber membrane having a thickness of about 150 microns.

16. The non-woven fiber membrane of claim 1 , wherein said non-woven fiber membrane further comprises a surfactant.

17. The non-woven fiber membrane of claim 1 , said non-woven fiber membrane having a capillary flow time of from 75 to 300 seconds.

18. The non-woven fiber membrane of claim 17 , said non-woven fiber membrane having a capillary flow time of from 125 to 250 seconds.

19. The non-woven fiber membrane of claim 17 , said non-woven fiber membrane having a capillary flow time of from 175 to 200 seconds.

20. The non-woven fiber membrane of claim 1 , wherein the non-woven fiber membrane passes a detector bead mobility test for beads having a size of from 40 to 600 nm.

21. The non-woven fiber membrane of claim 1 , wherein the non-woven fiber membrane passes a detector bead mobility test for beads having a size of from 200 to 440 nm.

22. The non-woven fiber membrane of claim 1 , wherein the non-woven fiber membrane passes a detector bead mobility test for beads having a size of about 400 nm.

23. The non-woven fiber membrane of claim 1 , the non-woven fiber membrane having a protein binding capacity of about 70 to 120 μg/cm 2 for a thickness of at least about 40 to 60 microns.

Assignments (6)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 22, 2021
From: EMD MILLIPORE CORPORATION
To: MERCK MILLIPORE LTD
Reel/Frame 057559/0886 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 22, 2021
From: MILLIPORE (U.K.) LTD
To: MERCK MILLIPORE LTD
Reel/Frame 057559/0933 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 22, 2021
From: BEYZAVI, KAMRAN
To: MILLIPORE (U.K.) LTD
Reel/Frame 057559/0992 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 22, 2021
From: FITZGERALD, THOMAS
To: MERCK MILLIPORE LTD
Reel/Frame 057560/0081 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 22, 2021
From: RAJENDIRAN, MURUGAN; PADAMATI, RAMESH BABU
To: THE PROVOST, FELLOWS, FOUNDATION SCHOLARS AND MEMBERS OF BOARD, OF THE COLLEGE OF THE HOLY AND UNDIVIDED TRINITY OF QUEEN ELIZABETH
Reel/Frame 057560/0112 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 22, 2021
From: CATALDO, WILLIAM; ELKINA, INGA; AQUINO, DENNIS; CALLAHAN, DANIEL; MANSFIELD, MICHAEL; KOZLOV, MIKHAIL; TKACIK, GABRIEL
To: EMD MILLIPORE CORPORATION
Reel/Frame 057561/0788 →
Continuity (2)
Provisional Application 62535586 · Jul 21, 2017
Related Publication 20200173076A1 · Jun 4, 2020
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