Patent US1891841A successfully refreshed from Google Patents.
US1891841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yeast propagation controlling method
Assignee: Individual
•
Filing: 1927-12-20
•
Granted: 1932-12-20
•
Expires: 1947-12-20
Abstract
No abstract record available.
Inventors
- 👤 Sak Soren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:11
CPC Classifications
C; C12; C12N; C12N1/00; C12N1/14; C12N1/16; Y; Y10; Y10S; Y10S435/00; Y10S435/813; Y10S435/818; Y10S435/819
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1935-12-20 | 1936-06-20 | 1936-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1939-12-20 | 1940-06-20 | 1940-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1943-12-20 | 1944-06-20 | 1944-12-20 | $7700.00 | Window Closed / Lapsed |