Patent US3497890A successfully refreshed from Google Patents.
US3497890A
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Fastener and method of making the same
Assignee: TORKON FASTENER CORP
•
Filing: 1967-08-31
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Granted: 1970-03-03
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Expires: 1987-08-31
Abstract
No abstract record available.
Inventors
- 👤 Jan R Coyle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:21
CPC Classifications
F; F16; F16B; F16B37/00; F16B37/12; F16B37/122; B; B21; B21D; B21D53/00; B21D53/24; B21H; B21H3/00; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/929; Y10T; Y10T29/00; Y10T29/49; Y10T29/49789; Y10T29/49794
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2796107A
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US3029856A
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US2956293A
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US3163196A
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GB1048381A
Cited
US3324920A
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US3391721A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |