IP Library › Granted Patent US 12,378,514
Granted Patent B2
US 12,378,514 · App. 17/318,738 · Granted Aug 5, 2025

Material transfer devices and related systems and methods

Inventor: Chanyong Brian Lee (Newbury Park, CA)
Assignee: PBS BIOTECH, INC.
C12M29/18C12M23/58C12M25/14C12M41/46C12N1/00
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Quick Facts
Patent No.
US 12,378,514
App. No.
17/318,738
Granted
Aug 5, 2025
Kind
B2
Abstract

Material transfer devices and related systems and methods are disclosed. In accordance with an example, a material transfer device includes a housing including a first housing portion and a second housing portion and a screen. The first housing portion includes a first inlet port, a first outlet port, and a first transfer opening. The second housing portion has a second inlet port, a second outlet port, and a second transfer opening. The first transfer opening is disposed adjacent to and in communication with the second transfer opening. The screen is disposed between the housing portions adjacent to the first and second transfer openings.

Claims (26)

1. A method of using a material transfer device including a first housing portion and a second housing portion with a screen disposed between the housing portions, each of the housing portions including an inlet port, an outlet port, and corresponding fluidic tubes connected to the inlet and outlet ports, the method comprising:

transferring cell aggregates or microcarriers suspended in spent medium through the inlet port of the first housing portion;

supporting the screen using a support operably coupled to at least one of the first and second housing portions and disposed between the first and second housing portions;

filtering the cell aggregates or the microcarriers using the screen by passing all of the spent medium through the screen and into the second housing portion, all of the cell aggregates or all of the microcarriers being retained within the first housing portion after all of the spent medium passes through the screen;

transferring the spent medium out of the outlet port of the second housing portion; and

transferring fresh medium into the first housing portion;

resuspending the cell aggregates or the microcarriers in the fresh medium in the first housing portion; and

transferring the cell aggregates or the microcarriers suspended in the fresh medium out of the outlet port of the first housing portion.

2. The method of claim 1 , wherein passing the spent medium through the screen includes passing the spent medium through a first transfer opening of the first housing portion and a second transfer opening of the second housing portion disposed adjacent to and in communication with the first transfer opening.

3. The method of claim 1 , wherein passing the spent medium through the screen includes passing the spent medium through the screen horizontally disposed relative to a horizontal plane.

4. The method of claim 1 , wherein passing the spent medium through the screen includes passing the spent medium through the screen disposed at an angle relative to a horizontal plane.

5. The method of claim 1 , wherein transferring fresh medium into the first housing portion or the second housing portion comprises transferring the fresh medium into the second housing portion and passing the fresh medium through the screen into the first housing portion.

6. The method of claim 1 , wherein at least part of the first housing portion is disposed below at least part of the screen.

7. The method of claim 1 , wherein the first housing portion is disposed entirely below the screen.

8. The method of claim 1 , wherein at least part of the first housing portion is disposed below at least part of the second housing portion.

9. The method of claim 1 , wherein the first housing portion is disposed entirely below the second housing portion.

10. The method of claim 1 , wherein transferring the spent medium including the cell aggregates or the microcarriers through the inlet port of the first housing portion comprises:

(a) pumping the cell aggregates or the microcarriers in the spent medium to the material transfer device,

(b) flowing the cell aggregates or the microcarriers in the spent medium to the material transfer device based on gravity, or

(c) flowing the cell aggregates or the microcarriers in the spent medium to the material transfer device based on a pressure differential between a first bioreactor and the material transfer device.

11. The method of claim 1 , further comprising heating the fresh medium being transferred into the first housing portion or the second housing portion.

12. The method of claim 1 , further comprising heating the material transfer device.

13. The method of claim 1 , further comprising rotating the material transfer device to encourage the cell aggregates or the microcarriers to move away from the screen and become resuspended.

14. The method of claim 1 , further comprising inhibiting leaks from between the first housing portion and the second housing portion using a seal disposed at an interface between the first housing portion and the second housing portion.

15. The method of claim 1 , further comprising changing a pump rate in response to a flow rate of the spent medium through the screen satisfying a threshold value.

16. The method of claim 1 , wherein transferring the spent medium including the cell aggregates or the microcarriers through the inlet port of the first housing portion comprises transferring the spent medium including the cell aggregates or the microcarriers from a first bioreactor through the inlet port of the first housing portion and wherein transferring the cell aggregates or the microcarriers suspended in the fresh medium out of the outlet port of the first housing portion comprises transferring the cell aggregates or the microcarriers suspended in the fresh medium out of the outlet port of the first housing portion and into the first bioreactor or a second bioreactor different from the first bioreactor.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 25, 2021
From: LEE, CHANYONG BRIAN
To: PBS BIOTECH, INC.
Reel/Frame 056348/0875 →
Continuity (2)
Provisional Application 62704473 · May 12, 2020
Related Publication 20210355425A1 · Nov 18, 2021
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