US1991993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing products of fermentation
Assignee: IOWA STATE COLLEGE OF AGRICULT
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Filing: 1930-10-10
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Granted: 1935-02-19
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Expires: 1950-10-10
Abstract
No abstract record available.
Inventors
- 👤 Werkman Chester Hamlin
- 👤 Rayburn Clarence Howard
- 👤 Hixon Ralph Malcolm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:30
CPC Classifications
C; C12; C12P; C12P7/00; C12P7/40; C12P7/52
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) | 1938-02-18 | 1938-08-20 | 1939-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-02-18 | 1942-08-20 | 1943-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-02-18 | 1946-08-20 | 1947-02-19 | $7700.00 | Window Closed / Lapsed |