US2847894A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Socketed screw head with uniformly offset grooves
Assignee: AMERICAN SCREW CO
•
Filing: 1955-03-16
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Granted: 1958-08-19
•
Expires: 1975-03-16
Abstract
No abstract record available.
Inventors
- 👤 Ian A Smith
- 👤 Herman G Muenchinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:08
CPC Classifications
B; B25; B25B; B25B15/00; B25B15/001; B25B15/004; B25B15/005; F; F16; F16B; F16B23/00; F16B23/0007; F16B23/0023; Y; Y10; Y10S; Y10S411/00; Y10S411/919
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US101207A
Cited
USRE15483E
Cited
US1797390A
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US1956963A
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US2216382A
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US2304704A
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US2445978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-08-18 | 1962-02-17 | 1962-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-18 | 1966-02-17 | 1966-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-18 | 1970-02-17 | 1970-08-19 | $7700.00 | Window Closed / Lapsed |