Patent US2972186A successfully refreshed from Google Patents.
US2972186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mandrel swage
Assignee: Chicago Forging and Manufacturing Co
•
Filing: 1955-11-14
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Granted: 1961-02-21
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Expires: 1975-11-14
Abstract
No abstract record available.
Inventors
- 👤 Earl E Howe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:04
CPC Classifications
B; B21; B21K; B21K25/00; B21D; B21D39/00; B21D39/04; F; F16; F16L; F16L23/00; F16L23/02; F16L23/024; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49833; Y10T29/49908; Y10T29/49925; Y10T29/49927
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US407038A
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US489439A
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US930863A
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US2225345A
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US2230116A
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US2256740A
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US2335414A
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US2301280A
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US2382359A
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US2455667A
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US2417536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-02-21 | 1964-08-22 | 1965-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-21 | 1968-08-22 | 1969-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-21 | 1972-08-22 | 1973-02-21 | $7700.00 | Window Closed / Lapsed |