Patent US2440546A successfully refreshed from Google Patents.
US2440546A
Expired / Lapsed
US
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Symbiotic process for preparing yeast and other products
Assignee: Individual
•
Filing: 1941-11-03
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Granted: 1948-04-27
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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
2026-11-06 12:21
CPC Classifications
C; C12; C12P; C12P39/00; C12N; C12N1/00; C12N1/14; C12N1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US454586A
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US621796A
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US1474674A
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GB221592A
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GB272447A
Cited
US2095638A
Cited
US2235827A
Cited
US2276710A
Cited
US2223465A
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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 |