US2877680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Headless set screws with center of gravity located so that screw will be properly oriented
Assignee: SET SCREW AND Manufacturing CO
•
Filing: 1955-06-09
•
Granted: 1959-03-17
•
Expires: 1975-06-09
Abstract
No abstract record available.
Inventors
- 👤 Calvin O Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:25
CPC Classifications
F; F01; F01N; F01N1/00; F01N1/16; F01N1/22; F16; F16B; F16B35/00; F16B35/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1609994A
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US1863314A
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US2021704A
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US2555243A
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US2574677A
Cited
US2631635A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |