US3218641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fm radar system with automatic bandwidth control
Assignee: Lockheed Martin Corp
•
Filing: 1962-10-01
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Granted: 1965-11-16
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Expires: 1982-10-01
Abstract
No abstract record available.
Inventors
- 👤 Robert L Maynard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:34
CPC Classifications
H; H03; H03G; H03G5/00; H03G5/16; G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/32; G01S13/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
IN A RADIO RANGE SYSTEM OF THE TYPE INCLUDING A RECEIVER WHCH DEVELOPS IN ITS OUTPUT A BEAT FREQUENCY SIGNAL CORRESPONDING TO THE DIFFERENCE BETWEEN THE TRANSMITTED AND RECEIVED FREQUENCIES, THE FREQUENCY OF SAID BEAT FREQUENCY SIGNAL BEING INDICATIVE OF THE RANGE MEASURED BY SAID SYSTEM, THE IMPROVEMENT COMPRISING, (A) A VARIABLE BAND-PASS FILTER CONNECTED TO FILTER SAID RECEIVER OUTPUT, (B) TUNING MEANS CONTROLLING THE POSITION OF THE PASS-
Claim 2
Dependent Claim
69 words
IN A RADIO RANGE SYSTEM OF THE TYPE INCLUDING A RECEIVER WHCH DEVELOPS IN ITS OUTPUT A BEAT FREQUENCY SIGNAL CORRESPONDING TO THE DIFFERENCE BETWEEN THE TRANSMITTED AND RECEIVED FREQUENCIES, THE FREQUENCY OF SAID BEAT FREQUENCY SIGNAL BEING INDICATIVE OF THE RANGE MEASURED BY SAID SYSTEM, THE IMPROVEMENT COMPRISING, (A) A VARIABLE BAND-PASS FILTER CONNECTED TO FILTER SAID RECEIVER OUTPUT, (B) TUNING MEANS CONTROLLING THE POSITION OF THE PASS-
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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) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |