Patent US2421153A successfully refreshed from Google Patents.
US2421153A
Expired / Lapsed
US
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Coupler
Assignee: American Steel Foundries
•
Filing: 1943-06-23
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Granted: 1947-05-27
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Expires: 1963-06-23
Abstract
No abstract record available.
Inventors
- 👤 Edmund P Kinne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:52
CPC Classifications
B; B61; B61G; B61G3/00; B61G3/04; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18888; Y10T74/1892; Y10T74/18952; Y10T74/20; Y10T74/20576; Y10T74/20582; Y10T74/20588
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1316415A
Cited
US518754A
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US599899A
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US613314A
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US628329A
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US700441A
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US757366A
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US848763A
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US941965A
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US974154A
Cited
US1204119A
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US1952347A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-05-26 | 1950-11-25 | 1951-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-05-26 | 1954-11-25 | 1955-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-05-26 | 1958-11-25 | 1959-05-27 | $7700.00 | Window Closed / Lapsed |