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Patent US3431812A successfully refreshed from Google Patents.
US3431812A
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US
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Fixed force level nut
Assignee: NORMAN C DAHL
•
Filing: 1968-01-30
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Granted: 1969-03-11
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Expires: 1988-01-30
Abstract
No abstract record available.
Inventors
- 👤 Norman C Dahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:08
CPC Classifications
F; F16; F16B; F16B31/00; F16B31/02; F16B31/024
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2286895A
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US2464152A
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US2495409A
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US2781687A
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GB854792A
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US3135154A
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US3174386A
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US3224316A
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US3306154A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |