Patent US2672070A successfully refreshed from Google Patents.
US2672070A
Expired / Lapsed
US
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Wire coil screw thread insert for molded material
Assignee: Heli Coil Corp
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Filing: 1953-06-10
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Granted: 1954-03-16
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Expires: 1973-06-10
Abstract
No abstract record available.
Inventors
- 👤 John O Forster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:43
CPC Classifications
F; F16; F16B; F16B37/00; F16B37/12; B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/16; B29C70/20; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49881
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2439685A
Cited
US2607259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-15 | 1957-09-14 | 1958-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-15 | 1961-09-14 | 1962-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-15 | 1965-09-14 | 1966-03-16 | $7700.00 | Window Closed / Lapsed |