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US2443919A
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Fermentation process for production of alpha-ketoglutaric acid
Assignee: United States Department of Agriculture
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Filing: 1946-08-09
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Granted: 1948-06-22
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Expires: 1966-08-09
Abstract
No abstract record available.
Inventors
- 👤 Lewis B Lockwood
- 👤 Frank H Stodola
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:22
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/40; C12P7/44; C12P7/50; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/874; Y10S435/876
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US227716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |