US2586007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wire coil insert with tapered end
Assignee: Heli Coil Corp
•
Filing: 1947-03-20
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Granted: 1952-02-19
•
Expires: 1967-03-20
Abstract
No abstract record available.
Inventors
- 👤 Harkness W Cram
- 👤 John O Forster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:20
CPC Classifications
F; F16; F16B; F16B37/00; F16B37/12; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49881
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US132213A
Cited
US1966520A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-18 | 1955-08-20 | 1956-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-18 | 1959-08-20 | 1960-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-18 | 1963-08-20 | 1964-02-19 | $7700.00 | Window Closed / Lapsed |