Patent US2522453A successfully refreshed from Google Patents.
Patent US2440545A successfully refreshed from Google Patents.
US2440545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of yeast and of yeast and vitamin rich products
Assignee: Individual
•
Filing: 1941-11-03
•
Granted: 1948-04-27
•
Expires: 1961-11-03
Abstract
No abstract record available.
Inventors
- 👤 George A Jeffreys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:53
CPC Classifications
C; C12; C12N; C12N1/00; C12N1/14; C12N1/16; C12P; C12P39/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US454586A
Cited
US1474674A
Cited
US1534387A
Cited
GB272447A
Cited
US2031668A
Cited
US2031724A
Cited
US2095638A
Cited
US2276710A
Cited
US2223465A
Cited
US2319831A
Cited
US2285465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-27 | 1951-10-27 | 1952-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-27 | 1955-10-27 | 1956-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-27 | 1959-10-27 | 1960-04-27 | $7700.00 | Window Closed / Lapsed |