US3007239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making springs
Assignee: American Machine and Metals Inc
•
Filing: 1956-11-21
•
Granted: 1961-11-07
•
Expires: 1976-11-21
Abstract
No abstract record available.
Inventors
- 👤 Lermont Basil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:31
CPC Classifications
B; B21; B21F; B21F3/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49609
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1837209A
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US2071137A
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US2192101A
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US2179011A
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US2395651A
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US2246139A
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US2609193A
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US2609191A
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US2609192A
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US2647743A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |