Patent US2577733A successfully refreshed from Google Patents.
US2577733A
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Assignee: NAT INV S CORP
•
Filing: 1946-11-01
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Granted: 1951-12-11
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Expires: 1966-11-01
Abstract
No abstract record available.
Inventors
- 👤 Bridges John Herold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:46
CPC Classifications
H; H01; H01F; H01F38/00; H01F38/08; H01F38/10; Y; Y10; Y10S; Y10S174/00; Y10S174/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1895231A
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US2289175A
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US2212198A
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US2410624A
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US2265700A
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US2298935A
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US2335910A
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US2317844A
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US2351914A
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US2370633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-10 | 1955-06-11 | 1955-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-10 | 1959-06-11 | 1959-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-10 | 1963-06-11 | 1963-12-11 | $7700.00 | Window Closed / Lapsed |