US3716858A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Distance measuring system
Assignee: Ferranti International PLC
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Filing: 1971-04-06
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Granted: 1973-02-13
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Expires: 1991-04-06
Abstract
Abstract AND A VARIABLE GATING PULSE PRODUCED BY THE EQUIPMENT. A DISTANCE INDICATION IS GIVEN WHEN THIS PREDETERMINED TIME RELATIONSHIP IS ESTABLISHED. DISTANCE MEASURING SYSTEM EMPLOYS A RADAR OR SIMILAR SOURCE TO PRODUCE A RETURN SIGNAL FROM A TARGET. DIGITAL TECHNIQUE ARE EMPLOYED TO PRODUCE AND MAINTAIN A PREDETERMINED TIME RELATIONSHIP BETWEEN THE RETURN SIGNAL
Inventors
- 👤 W Worthington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:20
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/10; G01S13/18; G01S13/14; G01S13/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |