Patent US3137852A successfully refreshed from Google Patents.
US3137852A
Expired / Lapsed
US
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Frangible target
Assignee: DEL MAR ENGINEERING LAB Inc
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Filing: 1954-11-26
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Granted: 1964-06-16
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Expires: 1974-11-26
Abstract
No abstract record available.
Inventors
- 👤 Robert J Hopper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:57
CPC Classifications
H; H01; H01Q; H01Q15/00; H01Q15/14; H01Q15/18; F; F41; F41J; F41J9/00; F41J9/08; F41J9/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
AN AERIAL TOW TARGET OF THE TYPE DESCRIBED, COMPRISING: A STREAMLINED, ELONGATE RIGID BODY MEMBER HAVING LOW-DRAG AERODYNAMIC CHARACTERISTICS AND FORMED OF A NON-METALLIC MATERIAL PERMEABLE BY RADAR WAVES AND HAVING AN EXTREMELY HIGH VOLUME-WEIGHT RATIO TO AFFORD A RELATIVELY LARGE TARGET PROFILE FOR A GIVEN WEIGHT AND TO MINIMIZE THE FORCE OF IMPACT IN THE EVENT OF A COLLISION WITH AN AIRCRAFT; REFLECTOR MEANS CARRIED INTERNALLY OF SAID BODY MEMBER FOR REFLECTING EXTERNALLY PROPAGATED RADAR WAVES, SAID REFLECTOR MEANS COMPRISING LOW WEIGHT, LOW STRENGTH ELEMENTS TO AVOID DAMAGE TO AIRCRAFT INADVERTENTLY COLLIDING WITH SAID TOW TARGET; FIN ELEMENTS CARRIED BY
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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) | 1967-06-16 | 1967-12-16 | 1968-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-16 | 1971-12-16 | 1972-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-16 | 1975-12-16 | 1976-06-16 | $7700.00 | Window Closed / Lapsed |