Patent US3425473A successfully refreshed from Google Patents.
US3425473A
Expired / Lapsed
US
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Washer-nut combination having a frangible connecting element
Assignee: United Carr Inc
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Filing: 1966-10-25
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Granted: 1969-02-04
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Expires: 1986-10-25
Abstract
No abstract record available.
Inventors
- 👤 Edward A Knowlton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:21
CPC Classifications
F; F16; F16B; F16B37/00; F16B37/02; F16B43/00; F16B43/02; Y; Y10; Y10S; Y10S411/00; Y10S411/955; Y10S411/956; Y10S411/96
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1874462A
Cited
US2520259A
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US2754872A
Cited
US2770161A
Cited
US2851079A
Cited
US2996735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |