US2492901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Biased diode logarithmic compensating circuit for electrical instruments
Assignee: GAF Chemicals Corp
•
Filing: 1946-05-07
•
Granted: 1949-12-27
•
Expires: 1966-05-07
Abstract
No abstract record available.
Inventors
- 👤 Monroe H Sweet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:15
CPC Classifications
G; G01; G01J; G01J1/00; G01J1/42; G01J1/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE432366C
Cited
US2118933A
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US2325179A
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US2305952A
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US2361549A
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US2406716A
Cited
US2400190A
Cited
US2407564A
Cited
US2417023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-26 | 1953-06-27 | 1953-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-26 | 1957-06-27 | 1957-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-26 | 1961-06-27 | 1961-12-27 | $7700.00 | Window Closed / Lapsed |