US4748124A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compartmentalized cell-culture device and method
Assignee: EIDP Inc
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Filing: 1984-10-30
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Granted: 1988-05-31
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Expires: 2004-10-30
Abstract
Abstract A closed, cell culture device constructed using a first and second sheet of gas permeable, liquid-impermeable material. A third sheet of a material selectively permeable to a class of molecules sandwiched between the first and second sheets, all of the sheets being formed such that the first and third sheets define a first closed compartment and the second and third sheets define a second closed compartment, each compartment having an access port.
Inventors
- 👤 Erwin A. Vogler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:24
CPC Classifications
C; C12; C12M; C12M23/00; C12M23/34; C12M23/24; C12M29/00; C12M29/04; Y; Y10; Y10S; Y10S435/00; Y10S435/818
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
77 words
A method of culturing cells comprising the steps: placing the cells in a first compartment with a culture medium, said first compartment composed of an upper dialysis membrane and a lower gas-permeable, liquid-impermeable sheet; injecting a culture medium in a second compartment above said dialysis membrane; permitting waste products from said cells to flow upwardly through said dialysis membrane; and exchanging incubator gases through said gas-permeable sheet whereby said cells grow continuously without clogging said dialysis membrane.
Claim 2
Independent Claim
77 words
A method of culturing cells comprising the steps: placing the cells in a first compartment with a culture medium, said first compartment composed of an upper dialysis membrane and a lower gas-permeable, liquid-impermeable sheet; injecting a culture medium in a second compartment above said dialysis membrane; permitting waste products from said cells to flow upwardly through said dialysis membrane; and exchanging incubator gases through said gas-permeable sheet whereby said cells grow continuously without clogging said dialysis membrane.
Claim 3
Dependent Claim
143 words
A closed dual compartment cell culture device comprising: two sheets of gas-permeable, liquid impermeable material disposed horizontally with one over the other to form a top sheet and a bottom sheet; a dialysis membrane disposed between said two sheets; one separating means between said membrane and said bottom sheet to form a bottom compartment adapted to contain cells to be cultured and a culture medium; second separating means between said membrane and said top sheet to form a top compartment adapted to contain a culture medium; access ports in each of said separating means to permit injection of material into said compartments; said dialysis membrane adapted to permit waste products to flow from said bottom compartment to said top compartment while adapted to retain macromolecules for cell growth in the bottom compartment and said gas-permeable sheets are adapted to exchange incubator atmospheric gases.
Claim 4
Dependent Claim
143 words
A closed dual compartment cell culture device comprising: two sheets of gas-permeable, liquid impermeable material disposed horizontally with one over the other to form a top sheet and a bottom sheet; a dialysis membrane disposed between said two sheets; one separating means between said membrane and said bottom sheet to form a bottom compartment adapted to contain cells to be cultured and a culture medium; second separating means between said membrane and said top sheet to form a top compartment adapted to contain a culture medium; access ports in each of said separating means to permit injection of material into said compartments; said dialysis membrane adapted to permit waste products to flow from said bottom compartment to said top compartment while adapted to retain macromolecules for cell growth in the bottom compartment and said gas-permeable sheets are adapted to exchange incubator atmospheric gases.
Claim 5
Dependent Claim
18 words
A device as set forth in claim 2 wherein said two sheets are composed of an ionomer resin.
Claim 6
Dependent Claim
14 words
A device as set forth in claim 2 wherein said two sheets are transparent.
Claim 7
Dependent Claim
16 words
A device as set forth in claim 2 wherein said dialysis membrane is a cellulosic membrane.
Claim 8
Dependent Claim
35 words
A device as set forth in claim 2 wherein said dialysis membrane is permeable to compounds having a molecular weight less than 8000 and impermeable to compounds having a molecular weight of 8000 and above.
Claim 9
Dependent Claim
35 words
A device as set forth in claim 2 wherein said dialysis membrane is permeable to compounds having a molecular weight less than 15,000 and impermeable to compounds having a molecular weight of 15,000 and above.
Claim 10
Dependent Claim
23 words
A device as set forth in claim 2 wherein said separating means between said sheets involves seals surrounding the edges of said sheets.
Claim 11
Dependent Claim
37 words
A device as set forth in claim 2 wherein said separating means comprises two peripheral support frames, one separating the top sheet and the dialysis membrane and a second separating the dialysis membrane and the bottom sheet.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-05-31 | 1991-11-30 | 1992-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-31 | 1995-11-30 | 1996-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-31 | 1999-11-30 | 2000-05-31 | $7700.00 | Window Closed / Lapsed |