US3522541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital matched filter employing quadrature component correlation apparatus
Assignee: GTE Sylvania Inc
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Filing: 1967-11-13
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Granted: 1970-08-04
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Expires: 1987-11-13
Abstract
No abstract record available.
Inventors
- 👤 Dennis J Gooding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:31
CPC Classifications
H; H04; H04L; H04L7/00; H04L7/04; H04L7/041; H04L7/043; H04L25/00; H04L25/02; H04L25/03; H04L25/03006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-08-03 | 1974-02-02 | 1974-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-08-03 | 1978-02-02 | 1978-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-08-03 | 1982-02-02 | 1982-08-04 | $7700.00 | Window Closed / Lapsed |