US2776926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of alpha-ketoglutaric acid by serratia marcescens
Assignee: Individual
•
Filing: 1955-08-04
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Granted: 1957-01-08
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Expires: 1975-08-04
Abstract
No abstract record available.
Inventors
- 👤 Eugene S Sharpe
- 👤 Corman Julian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:33
CPC Classifications
C; C07; C07C; C07C59/00; C07C59/235; C07C59/347; C12; C12P; C12P7/00; C12P7/40; C12P7/44; C12P7/50; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/88; Y10S435/881
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2443919A
Cited
US2724680A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-01-08 | 1960-07-09 | 1961-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-01-08 | 1964-07-09 | 1965-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-01-08 | 1968-07-09 | 1969-01-08 | $7700.00 | Window Closed / Lapsed |