Patent US3496840A successfully refreshed from Google Patents.
US3496840A
Expired / Lapsed
US
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Fastener driving apparatus
Assignee: Duo Fast Corp
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Filing: 1968-01-29
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Granted: 1970-02-24
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Expires: 1988-01-29
Abstract
No abstract record available.
Inventors
- 👤 Oscar A Wandel
- 👤 Thomas H Dorney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:50
CPC Classifications
B; B25; B25C; B25C1/00; B25C1/04; B25C1/047
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US537357A
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US1481643A
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FR666302A
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US2699756A
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US2914032A
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US3104395A
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US3315951A
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US3301335A
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US3301456A
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US3320860A
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FR1435655A
Cited
US3403600A
Cited
US3396636A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-23 | 1973-08-25 | 1974-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-23 | 1977-08-25 | 1978-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-23 | 1981-08-25 | 1982-02-24 | $7700.00 | Window Closed / Lapsed |