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US2550784A
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Assignee: Individual
•
Filing: 1947-03-25
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Granted: 1951-05-01
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Expires: 1967-03-25
Abstract
No abstract record available.
Inventors
- 👤 Paul G Coupland
- 👤 Clayborn M Wingate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:37
CPC Classifications
H; H01; H01H; H01H43/00; H01H43/10; H01H43/12; H01H43/124
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2124195A
Cited
US2154437A
Cited
US2201162A
Cited
US2240498A
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US2172492A
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US2248116A
Cited
US2367363A
Cited
US2332767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |