US2870328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Proportional amplitude discriminator
Assignee: AT&T Inc
•
Filing: 1953-06-12
•
Granted: 1959-01-20
•
Expires: 1973-06-12
Abstract
No abstract record available.
Inventors
- 👤 Richard C Pomeroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:16
CPC Classifications
H; H03; H03G; H03G11/00; H03G11/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2129027A
Cited
US2279819A
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US2215175A
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US2338412A
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US2519890A
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US2677760A
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US2556074A
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US2572850A
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US2561182A
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US2611821A
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US2660668A
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US2673294A
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US2783377A
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US2715181A
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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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |