US2767258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage doubling demodulator
Assignee: North American Aviation Corp
•
Filing: 1952-10-10
•
Granted: 1956-10-16
•
Expires: 1972-10-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Keith L Sanders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:18
CPC Classifications
H; H03; H03D; H03D1/00; H03D1/14; H03D1/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2144226A
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US2502887A
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US2270697A
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US2399695A
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US2380947A
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US2329073A
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US2389692A
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US2445773A
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US2497202A
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US2519223A
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US2487010A
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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) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |