Patent US2275612A successfully refreshed from Google Patents.
US2275612A
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Perforating method and apparatus
Assignee: Individual
•
Filing: 1940-12-11
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Granted: 1942-03-10
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Expires: 1960-12-11
Abstract
No abstract record available.
Inventors
- 👤 Chandler Frank Jermain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:56
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/24; Y; Y10; Y10S; Y10S264/00; Y10S264/70; Y10S425/00; Y10S425/037; Y10T; Y10T83/00; Y10T83/04; Y10T83/0405; Y10T83/041; Y10T83/0414; Y10T83/05; Y10T83/283; Y10T83/444; Y10T83/4475; Y10T83/4483
Claims Analysis
Total Claims: 0
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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) | 1945-03-09 | 1945-09-08 | 1946-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-03-09 | 1949-09-08 | 1950-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-03-09 | 1953-09-08 | 1954-03-10 | $7700.00 | Window Closed / Lapsed |