Patent US3021593A successfully refreshed from Google Patents.
US3021593A
Expired / Lapsed
US
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Method of making metal rings
Assignee: Individual
•
Filing: 1958-05-05
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Granted: 1962-02-20
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Expires: 1978-05-05
Abstract
No abstract record available.
Inventors
- 👤 Walter F Cousino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:47
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/16; B21D53/20; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49789; Y10T29/49798
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1220596A
Cited
US1600116A
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US2061780A
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US1544715A
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US1675299A
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US1850029A
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US1973227A
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US2137797A
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US2229639A
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US2647501A
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US2674985A
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US2760259A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |