Patent DE3322978A1 successfully refreshed from Google Patents.
US3120254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self tapping screw having grid-like bearing surface
Assignee: Russell Burdsall and Ward Corp
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Filing: 1960-09-01
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Granted: 1964-02-04
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Expires: 1980-09-01
Abstract
No abstract record available.
Inventors
- 👤 William G Waltermire
- 👤 Arthur R Breed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:56
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/282; F16B33/00; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/956; Y10S411/957; Y10S411/959
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US910712A
Cited
CH101329A
Cited
US1946800A
Cited
US2210455A
Cited
US2191613A
Cited
US2833326A
Cited
US2934684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-03 | 1967-08-05 | 1968-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-03 | 1971-08-05 | 1972-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-03 | 1975-08-05 | 1976-02-04 | $7700.00 | Window Closed / Lapsed |