Patent US4900629A successfully refreshed from Google Patents.
US4806484A
Expired / Lapsed
US
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Perfusion airlift bioreactor
Assignee: IGB PRODUCTS Ltd 14310 CATALINA ST SAN LEANDRO CA 94577 A CORP OF
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Filing: 1987-08-07
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Granted: 1989-02-21
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Expires: 2007-08-07
Abstract
Abstract A perfusion airlift bioreactor system that consists of the bioreactor, a media reservoir and a molecular weight cutoff (MWCO) filter positioned between the media reservoir and the airlift bioreactor.
Inventors
- 👤 Ashot Petrossian
- 👤 Andy DeGiovanni
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:48
CPC Classifications
C; C12; C12M; C12M25/00; C12M25/16; C12M29/00; C12M29/02; C12M29/06; C12M29/08; C12M29/10; C12M47/00; C12M47/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
An apparatus for growing eukaryotic cells consisting essentially of: (a) a two liter airlift bioreactor accomaditing eukaryotic cells in suspension, encapsulated or on microcarriers in a medium supporting cell growth, (b) a 19 square foot 30,000 molecular weight cutoff hollow fiber bundle filter, positioned between said bioreactor and said media reservoir, (c) pump means operably connected to said bioreactor and said filter for circulating said medium into the filter and returning said medium to the bioreactor, (d) pump means operably connected to said filter and a 50 liter medium reservoir for circulating said medium from said reservoir to said filter and returning said medium to said medium reservoir, (e) pump means operably connected to said bioreactor for admitting air into said airlift bioreactor for stirring the suspension of cells and medium whereby, (f) the spent bioreactor medium containing product/s is dialyzed aganst a fresh reservoir medium through said hollow fiber filter.
Claim 2
Independent Claim
151 words
An apparatus for growing eukaryotic cells consisting essentially of: (a) a two liter airlift bioreactor accomaditing eukaryotic cells in suspension, encapsulated or on microcarriers in a medium supporting cell growth, (b) a 19 square foot 30,000 molecular weight cutoff hollow fiber bundle filter, positioned between said bioreactor and said media reservoir, (c) pump means operably connected to said bioreactor and said filter for circulating said medium into the filter and returning said medium to the bioreactor, (d) pump means operably connected to said filter and a 50 liter medium reservoir for circulating said medium from said reservoir to said filter and returning said medium to said medium reservoir, (e) pump means operably connected to said bioreactor for admitting air into said airlift bioreactor for stirring the suspension of cells and medium whereby, (f) the spent bioreactor medium containing product/s is dialyzed aganst a fresh reservoir medium through said hollow fiber filter.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-21 | 1992-08-22 | 1993-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-21 | 1996-08-22 | 1997-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-21 | 2000-08-22 | 2001-02-21 | $7700.00 | Window Closed / Lapsed |