Patent US2533253A successfully refreshed from Google Patents.
US2533253A
Expired / Lapsed
US
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Automatic regulating system and peak limiter
Assignee: Individual
•
Filing: 1945-09-17
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Granted: 1950-12-12
•
Expires: 1965-09-17
Abstract
No abstract record available.
Inventors
- 👤 Royal V Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:29
CPC Classifications
H; H03; H03G; H03G7/00; H03G7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2012810A
Cited
US2250559A
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US2404160A
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US2244695A
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US2276952A
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US2286106A
Cited
US2213034A
Cited
US2247468A
Cited
US2276873A
Cited
US2390850A
Cited
US2392384A
Cited
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 |