US2275639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glycerin fermentation process
Assignee: SPEAS DEV CO
•
Filing: 1940-02-01
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Granted: 1942-03-10
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Expires: 1960-02-01
Abstract
No abstract record available.
Inventors
- 👤 Nathan M Mnookin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:17
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/02; C12P7/04; C12P7/18; C12P7/20
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) | 1945-03-09 | 1945-09-08 | 1946-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-03-09 | 1949-09-08 | 1950-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-03-09 | 1953-09-08 | 1954-03-10 | $7700.00 | Window Closed / Lapsed |