US3672953A
Expired / Lapsed
US
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Process for growing cells of a microorganism on a carbon-containing liquid substrate
Assignee: Mobil Oil AS
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Filing: 1970-02-09
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Granted: 1972-06-27
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Expires: 1990-02-09
Abstract
Abstract A PROCESS FOR GROWING CELLS OF A MICROORGANISM ON A CARBON-CONTAINING LIQUID SUBSTRATE WHICH IS PARTIALLY WATER-INSOLUBLE WHEREIN IT IS DESIRABLE THAT THE AMOUNT OF THE RESIDUAL SUBSTRATE IN RELATION TO THE AMOUNT OF THE CELLS BE AS LOW AS POSSIBLE. THE AMOUNT OF THE RESIDUAL SUBSTRATE IS KEPT LOW BY MAINTAINING A LOW CONCENTRATION OF THE SUBSTRATE IN THE CULTURE MEDIUM DURING GROWTH OF THE CELLS. THE LATTER IS ACCOMPLISHED BY INTRODUCING LIQUID SUBSTRATE INTO THE CULTURE MEDIUM IN RESPONSE TO THE PRESENCE ON THE SURFACE OF THE CULTURE MEDIUM OF A LAYER OF FOAM OF A PREDETERMINED HEIGHT. AN ANTIFOAMING AGENT IS ALSO EMPLOYED.
Inventors
- 👤 Vernon F Coty
- 👤 Israel J Heilweil
- 👤 Richard I Leavitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:36
CPC Classifications
C; C12; C12N; C12N1/00; C12N1/38; C12M; C12M41/00; C12M41/02; C12M41/26; Y; Y10; Y10S; Y10S435/00; Y10S435/802; Y10S435/813
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |