US3487203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Torsional delay line matched filter device
Assignee: United States Department of the Navy
•
Filing: 1966-12-07
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Granted: 1969-12-30
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Expires: 1986-12-07
Abstract
No abstract record available.
Inventors
- 👤 George F Lindsay
- 👤 Harper John Whitehouse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:53
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/30; G; G01; G01S; G01S7/00; G01S7/52; G01S7/523; G01S7/526; G01S7/527; G06; G06F; G06F7/00; G06F7/02; G06G; G06G7/00; G06G7/12; G06G7/19; G06G7/1914
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3357001A
Cited
US3371196A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |