US2812816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Key cutting apparatus
Assignee: Individual
•
Filing: 1953-03-20
•
Granted: 1957-11-12
•
Expires: 1973-03-20
Abstract
No abstract record available.
Inventors
- 👤 Hoffman Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:22
CPC Classifications
B; B23; B23P; B23P15/00; B23P15/005; Y; Y10; Y10S; Y10S83/00; Y10S83/917; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49833; Y10T83/00; Y10T83/647; Y10T83/654; Y10T83/6563
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1452308A
Cited
US1678319A
Cited
US1615020A
Cited
US2058719A
Cited
US2051139A
Cited
US2323949A
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US2317527A
Cited
US2619853A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-11 | 1961-05-13 | 1961-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-11 | 1965-05-13 | 1965-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-11 | 1969-05-13 | 1969-11-12 | $7700.00 | Window Closed / Lapsed |