Patent US3460428A successfully refreshed from Google Patents.
US3460428A
Expired / Lapsed
US
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Threaded fastener with torque limiting drive portions
Assignee: National Screw and Manufacturing Co
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Filing: 1968-03-07
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Granted: 1969-08-12
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Expires: 1988-03-07
Abstract
No abstract record available.
Inventors
- 👤 James F Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:33
CPC Classifications
F; F16; F16B; F16B31/00; F16B31/02; F16B31/021; F16B39/00; F16B39/22; F16B39/28; F16B39/284; Y; Y10; Y10S; Y10S411/00; Y10S411/919; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49863
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-08-11 | 1973-02-10 | 1973-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-08-11 | 1977-02-10 | 1977-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-08-11 | 1981-02-10 | 1981-08-12 | $7700.00 | Window Closed / Lapsed |