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US2444892A
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Coupling
Assignee: H A DOUGLAS Manufacturing Co
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Filing: 1945-07-09
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Granted: 1948-07-06
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Expires: 1965-07-09
Abstract
No abstract record available.
Inventors
- 👤 George M Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:21
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/08; F16L37/084; F16L37/0847; A; A47; A47L; A47L9/00; A47L9/24; A47L9/242
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US593191A
Cited
US2064397A
Cited
US2102802A
Cited
US2222018A
Cited
US2190882A
Cited
US2245151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-07-06 | 1952-01-05 | 1952-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-07-06 | 1956-01-05 | 1956-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-07-06 | 1960-01-05 | 1960-07-06 | $7700.00 | Window Closed / Lapsed |