US3191171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radar height sensor and low altitude altimeter
Assignee: Teledyne Ryan Aeronautical Corp
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Filing: 1962-09-10
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Granted: 1965-06-22
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Expires: 1982-09-10
Abstract
No abstract record available.
Inventors
- 👤 Richard D Zuefeldt
- 👤 David D Zak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:50
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/08; G01S13/32; G01S13/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A LOW ALTITUDE RADAR ALTIMETER HAVING A TRANSMITTER TRANSMITTING SIGNALS THAT ARE AMPLITUDE MODULATED BY A VARIABLE FREQUENCY OSCILLATOR AT A WAVE LENGTH SUCH THAT THE TRUE ALTITUDE OF THE TRANSMITTER FROM A REFLECTING SURFACE EQUALS AN INTERGRAL NUMBER OF QUATER-WAVE LENGTHS, IN ACCORDANCE WITH THE FORMULA
Claim 2
Dependent Claim
47 words
A LOW ALTITUDE RADAR ALTIMETER HAVING A TRANSMITTER TRANSMITTING SIGNALS THAT ARE AMPLITUDE MODULATED BY A VARIABLE FREQUENCY OSCILLATOR AT A WAVE LENGTH SUCH THAT THE TRUE ALTITUDE OF THE TRANSMITTER FROM A REFLECTING SURFACE EQUALS AN INTERGRAL NUMBER OF QUATER-WAVE LENGTHS, IN ACCORDANCE WITH THE FORMULA
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) | 1968-06-21 | 1968-12-21 | 1969-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-21 | 1972-12-21 | 1973-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-21 | 1976-12-21 | 1977-06-22 | $7700.00 | Window Closed / Lapsed |