US2820496A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seed-celling knife
Assignee: COMSTOCK FOODS Inc
•
Filing: 1956-07-12
•
Granted: 1958-01-21
•
Expires: 1976-07-12
Abstract
No abstract record available.
Inventors
- 👤 William L Keifer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 00:03
CPC Classifications
A; A23; A23N; A23N4/00; A23N4/12; A23N4/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1442859A
Cited
US2070311A
Cited
US2075750A
Cited
US2089501A
Cited
US2121097A
Cited
US2496637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |