US2646829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Driver for recessed head fasteners
Assignee: Research Engineering and Manufacturing Inc
•
Filing: 1948-07-13
•
Granted: 1953-07-28
•
Expires: 1968-07-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Harvey F Phipard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:00
CPC Classifications
B; B25; B25B; B25B15/00; B25B15/001; B25B15/004; B25B15/005; Y; Y10; Y10S; Y10S411/00; Y10S411/919
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1956963A
Cited
US2046840A
Cited
US2140449A
Cited
US2182568A
Cited
US2173707A
Cited
US2417225A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-27 | 1957-01-26 | 1957-07-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-27 | 1961-01-26 | 1961-07-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-27 | 1965-01-26 | 1965-07-28 | $7700.00 | Window Closed / Lapsed |