Patent US2533940A successfully refreshed from Google Patents.
US2533940A
Expired / Lapsed
US
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Antitelescoping coupler
Assignee: Buckeye Steel Castings Co
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Filing: 1944-04-12
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Granted: 1950-12-12
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Expires: 1964-04-12
Abstract
No abstract record available.
Inventors
- 👤 George T Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:09
CPC Classifications
B; B61; B61G; B61G3/00; B61G3/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US551091A
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US603864A
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US1066845A
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US629497A
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US705169A
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US703256A
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US803069A
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US1468725A
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US1874653A
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US2214718A
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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) | 1953-12-11 | 1954-06-12 | 1954-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-12-11 | 1958-06-12 | 1958-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-12-11 | 1962-06-12 | 1962-12-12 | $7700.00 | Window Closed / Lapsed |