Patent US3681200A successfully refreshed from Google Patents.
US3681200A
Expired / Lapsed
US
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Shell-and-tube fermentor
Assignee: Standard Oil Co
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Filing: 1970-11-09
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Granted: 1972-08-01
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Expires: 1990-11-09
Abstract
Abstract NOVEL APPARATUS FOR AEROBIC FERMENTATION TO PRODUCE SINGLE-CELL MICROORGANISMS, SUCH AS BACTERIA AND YEASTS, IS PROVEDED. SHELL-AND-TUBE HEAT EXCHANGE TECHNIQUES ARE ADAPTED TO PROVIDE COOLANT ON THE SHELL SIDE AND CIR- CULATING FERMENTATION BROTH ON THE TUBE SIDE TO ACHIEVE ECONOMIC TEMPERATURE CONTROL.
Inventors
- 👤 John A Ridgeway Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:49
CPC Classifications
C; C12; C12M; C12M29/00; C12M29/06; C12M27/00; C12M27/18; C12M27/24; Y; Y10; Y10S; Y10S435/00; Y10S435/804; Y10S435/8215; Y10S435/822; Y10S435/823; Y10S435/832; Y10S435/839; Y10S435/843; Y10S435/859; Y10S435/874; Y10S435/911; Y10S435/921; Y10S435/923; Y10S435/93; Y10S435/94; Y10S435/941; Y10S435/942
Claims Analysis
Total Claims: 0
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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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |