US3437249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastener driving apparatus
Assignee: Duo Fast Corp
•
Filing: 1966-08-22
•
Granted: 1969-04-08
•
Expires: 1986-08-22
Abstract
No abstract record available.
Inventors
- 👤 William H Baum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:24
CPC Classifications
B; B25; B25C; B25C1/00; B25C1/001; B25C1/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2355807A
Cited
US2409049A
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US2931038A
Cited
US2994878A
Cited
US3189220A
Cited
US3238983A
Cited
US3266697A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |