US3521037A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method of receiving disturbed signals
Assignee: DAVID C COLL
•
Filing: 1966-01-20
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Granted: 1970-07-21
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Expires: 1986-01-20
Abstract
No abstract record available.
Inventors
- 👤 David C Coll
- 👤 John R Storey
- 👤 Donald A George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:15
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/10; H04B1/12; H04B1/123
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3270188A
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US3221159A
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US3180445A
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US3320409A
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US3274541A
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US3303335A
Cited
US3307190A
Cited
US3403247A
Cited
US3400216A
Cited
US3315222A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-07-20 | 1974-01-19 | 1974-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-20 | 1978-01-19 | 1978-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-20 | 1982-01-19 | 1982-07-21 | $7700.00 | Window Closed / Lapsed |