US3986690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laser defense and countermeasure system for aircraft
Assignee: United States Department of the Air Force
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Filing: 1975-10-28
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Granted: 1976-10-19
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Expires: 1995-10-28
Abstract
Abstract A passive defense and countermeasure apparatus for an aircraft having a second skin formed as a rectroreflector. The retroreflecting elements are formed in a thin sheet of bright structural aluminum. The retro-reflecting sheet is secured to the stringers between the ribs in the wing structure and the stringers between the bulkheads in the fuselage. The retroreflective sheets form part of the exterior load carrying structure of the aircraft.
Inventors
- 👤 Robert W. Milling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:44
CPC Classifications
B; B64; B64D; B64D7/00; F; F41; F41H; F41H11/00; F41H11/02; F41J; F41J2/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
78 words
In an aircraft having structural load bearing members with a plurality of stringer members connected between the load bearing members and having an outer skin secured to the load bearing members and the stringers, a passive defense and countermeasure system for protecting the aircraft against laser weapon energy, comprising: means, within the aircraft for redirecting incident radiation back along the path of incidence; said radiation redirecting means forming a portion of the load bearing members of the aircraft.
Claim 2
Dependent Claim
78 words
In an aircraft having structural load bearing members with a plurality of stringer members connected between the load bearing members and having an outer skin secured to the load bearing members and the stringers, a passive defense and countermeasure system for protecting the aircraft against laser weapon energy, comprising: means, within the aircraft for redirecting incident radiation back along the path of incidence; said radiation redirecting means forming a portion of the load bearing members of the aircraft.
Claim 3
Dependent Claim
44 words
The device as recited in claim 1 wherein said radiation redirecting means includes thin bright structural aluminum sheets having a plurality of retroreflective elements formed in the outer surface; means for securing the thin aluminum sheets to the inner portions of said stringer members.
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) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |