US2931038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stapling apparatus
Assignee: Duo Fast Corp
•
Filing: 1955-11-14
•
Granted: 1960-04-05
•
Expires: 1975-11-14
Abstract
No abstract record available.
Inventors
- 👤 Oscar A Wandel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:53
CPC Classifications
B; B25; B25C; B25C5/00; B25C5/16; B25C5/1679
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2103176A
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US2355807A
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US2277931A
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US2368552A
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US2589491A
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US2632889A
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US2718963A
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US2707277A
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US2775765A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-05 | 1963-10-05 | 1964-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-05 | 1967-10-05 | 1968-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-05 | 1971-10-05 | 1972-04-05 | $7700.00 | Window Closed / Lapsed |