Patent US3389623A successfully refreshed from Google Patents.
US3389623A
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US
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Method of tightening high strength bolts and apparatus for use therein
Assignee: GKN Group Services Ltd
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Filing: 1966-01-18
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Granted: 1968-06-25
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Expires: 1986-01-18
Abstract
No abstract record available.
Inventors
- 👤 Peter J Gill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:52
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/14; B25B23/1405
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1131225A
Cited
US1985916A
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US2622465A
Cited
US2756622A
Cited
US2901934A
Cited
US3235953A
Cited
US3255521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-06-25 | 1971-12-25 | 1972-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-06-25 | 1975-12-25 | 1976-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-06-25 | 1979-12-25 | 1980-06-25 | $7700.00 | Window Closed / Lapsed |