Patent US2137716A successfully refreshed from Google Patents.
US2137716A
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US
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Perforator
Assignee: Bates Maufacturing Co
•
Filing: 1937-04-28
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Granted: 1938-11-22
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Expires: 1957-04-28
Abstract
No abstract record available.
Inventors
- 👤 Faas Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:08
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/32; B26F1/36; Y; Y10; Y10T; Y10T83/00; Y10T83/869; Y10T83/8776; Y10T83/8785; Y10T83/8821; Y10T83/8828; Y10T83/8841; Y10T83/8843
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) | 1941-11-21 | 1942-05-23 | 1942-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-11-21 | 1946-05-23 | 1946-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-11-21 | 1950-05-23 | 1950-11-22 | $7700.00 | Window Closed / Lapsed |