US3705082A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cultivation and recovery of micro-organisms
Assignee: BP PLC
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Filing: 1969-10-16
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Granted: 1972-12-05
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Expires: 1989-10-16
Abstract
Abstract A METHOD AND APPARTAUS FOR THE CULTIVATION OF MICROORGANISMS WHEREIN THE PUMPING EFFICIENCY OF CULTIVATED BROTH REMOVED FROM THE CULTIVATION ZONE IS IS IMPROVED BY FIRST SUBJECTING THE REMOVED CULTIVATED BROTH TO A SEPARATION STEP WHEREIN AERATED BROTH IS SEPARATED FROM PARTIALLY DE-AERATED BROTH UNDER THE ACTION OF THE DENSITY DIFFERENTIAL BETWEEN AERATED BROTH AND PARTIALLY DE-AERATED BROTH, AND THEREAFTER PUMPING PARTIALLY DE-AERATED BROTH BACK TO THE CULTIVATION ZONE. THE PROCESS IS PARTICULARLY SUITED TO FERMENTATIONS HAVING EXTERNAL HEAT EXCHANGE MEANS AND IN WHICH THE CULTIVATED BROTH IS HIGHLY AERATED.
Inventors
- 👤 Jean Claude Hondermarck
- 👤 Ian Cameron Bennett
- 👤 Jacques Guillo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:12
CPC Classifications
C; C12; C12M; C12M27/00; C12M27/18; C12M27/24; C12M33/00; C12M33/22; Y; Y10; Y10S; Y10S435/00; Y10S435/803; Y10S435/804; Y10S435/812; Y10S435/813; Y10S435/818; Y10S435/8215; Y10S435/822; Y10S435/824; Y10S435/84; Y10S435/843; Y10S435/85; Y10S435/859; Y10S435/867; Y10S435/869; Y10S435/872; Y10S435/886; Y10S435/897; Y10S435/904; Y10S435/911; Y10S435/913; Y10S435/921; Y10S435/923; Y10S435/924; Y10S435/93; Y10S435/933; Y10S435/938; Y10S435/944
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |