US2575107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant voltage positive bias supply
Assignee: Individual
•
Filing: 1946-04-30
•
Granted: 1951-11-13
•
Expires: 1966-04-30
Abstract
No abstract record available.
Inventors
- 👤 Charles F Hobbs
- 👤 Norman B Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:33
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2120884A
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US2252613A
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US2127822A
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US2268790A
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US2330638A
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US2383492A
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US2434069A
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US2484724A
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US2475050A
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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) | 1954-11-12 | 1955-05-14 | 1955-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-12 | 1959-05-14 | 1959-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-12 | 1963-05-14 | 1963-11-13 | $7700.00 | Window Closed / Lapsed |