Patent US3139617A successfully refreshed from Google Patents.
US3139617A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter air velocity sensing system
Assignee: Individual
•
Filing: 1960-01-26
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Granted: 1964-06-30
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Expires: 1980-01-26
Abstract
No abstract record available.
Inventors
- 👤 Eugene D Denman
- 👤 Neil E Welter
- 👤 James C Gravitt
- 👤 Bernard L Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:51
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/50; G01S13/58; G01S13/583
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
89 words
IN A METHOD FOR CALCULATING THE AIR SPEED OF A BODY MOVING IN SPACE WHICH INCLUDES STEPS OF PRODUCING AT A DISTANCE REMOTE FROM SAID BODY A VOLUME OF SPACE PERTURBED WITH SONIC ENERGY, DIRECTING A BEAM OF ELECTROMAGNETIC ENERGY FROM SAID BODY TOWARD SAID VOLUME OF SPACE, SUBSEQUENTLY DETECTING AT SAID BODY ELECTROMAGNETIC ENERGY BACK-SCATTERED FROM SAID VOLUME OF SPACE AND DETERMINING THE MAGNITUDE OF THE CHANGE IN FREQUENCY OF SAID DETECTED ELECTROMAGNETIC ENERGY BROUGHT ABOUT BY THE RELATIVE MOTION OF SAID BODY AND SAID VOLUME OF SPACE.
Claim 2
Dependent Claim
89 words
IN A METHOD FOR CALCULATING THE AIR SPEED OF A BODY MOVING IN SPACE WHICH INCLUDES STEPS OF PRODUCING AT A DISTANCE REMOTE FROM SAID BODY A VOLUME OF SPACE PERTURBED WITH SONIC ENERGY, DIRECTING A BEAM OF ELECTROMAGNETIC ENERGY FROM SAID BODY TOWARD SAID VOLUME OF SPACE, SUBSEQUENTLY DETECTING AT SAID BODY ELECTROMAGNETIC ENERGY BACK-SCATTERED FROM SAID VOLUME OF SPACE AND DETERMINING THE MAGNITUDE OF THE CHANGE IN FREQUENCY OF SAID DETECTED ELECTROMAGNETIC ENERGY BROUGHT ABOUT BY THE RELATIVE MOTION OF SAID BODY AND SAID VOLUME OF SPACE.
Claim 3
Dependent Claim
43 words
APPARATUS FOR DETERMINING THE AIR VELOCITY OF A MOVING VEHICLE COMPRISING A PULSE RADAR SET CARRIED BY SAID VEHICLE, SAID SET INCLUDING A DIRECTIONAL ELECTROMAGNETIC ENERGY RADIATING AND DETECTING ANTENNA AND A SOUND ENERGY BEAM FORMING MEANS LOCATED ALONG THE AXIS OF SYM-
Claim 4
Dependent Claim
43 words
APPARATUS FOR DETERMINING THE AIR VELOCITY OF A MOVING VEHICLE COMPRISING A PULSE RADAR SET CARRIED BY SAID VEHICLE, SAID SET INCLUDING A DIRECTIONAL ELECTROMAGNETIC ENERGY RADIATING AND DETECTING ANTENNA AND A SOUND ENERGY BEAM FORMING MEANS LOCATED ALONG THE AXIS OF SYM-
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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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |