Patent US4167009A successfully refreshed from Google Patents.
US4167009A
Expired / Lapsed
US
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Re-entry chaff
Assignee: McDonnell Douglas Corp
•
Filing: 1963-08-08
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Granted: 1979-09-04
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Expires: 1983-08-08
Abstract
Abstract 4. A radar disabling means, including: A plurality of individual pieces of radar reflective chaff, each having a tear-drop shape.
Inventors
- 👤 Walter Schwartz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:24
CPC Classifications
F; F42; F42B; F42B12/00; F42B12/02; F42B12/36; F42B12/56; F42B12/70
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
41 words
A radar disabling means, including: flat radar reflective chaff material having a leading portion and a trailing portion and with the leading and trailing portions both triangularly shaped and with the leading portion having a smaller area than the trailing portion.
Claim 2
Dependent Claim
41 words
A radar disabling means, including: flat radar reflective chaff material having a leading portion and a trailing portion and with the leading and trailing portions both triangularly shaped and with the leading portion having a smaller area than the trailing portion.
Claim 3
Dependent Claim
19 words
The chaff means of claim 1, wherein: the leading portion has a greater average thickness than the trailing portion.
Claim 4
Dependent Claim
13 words
The chaff means of claim 1, wherein: the trailing portion includes lightening holes.
Claim 5
Dependent Claim
19 words
A radar disabling means, including: a plurality of individual pieces of radar reflective chaff, each having a tear-drop shape.
Claim 6
Dependent Claim
19 words
A radar disabling means, including: a plurality of individual pieces of radar reflective chaff, each having a tear-drop shape.
Claim 7
Independent Claim
105 words
A method of aiding the penetration of a radar defense system protecting a target area by a ballistic missile, including the steps of: launching the ballistic missile by a booster rocket, ejecting aerodynamically stable radar reflecting chaff from the ballistic missile during the flight of the ballistic missile, forming a cloud of chaff surrounding the ballistic missile during the flight of the ballistic missile, and orienting individual pieces of chaff to reflect radar signals from the radar defense system during a major portion of the flight path of the ballistic missile to mask the location of the ballistic missile until it strikes the target area.
Claim 8
Independent Claim
105 words
A method of aiding the penetration of a radar defense system protecting a target area by a ballistic missile, including the steps of: launching the ballistic missile by a booster rocket, ejecting aerodynamically stable radar reflecting chaff from the ballistic missile during the flight of the ballistic missile, forming a cloud of chaff surrounding the ballistic missile during the flight of the ballistic missile, and orienting individual pieces of chaff to reflect radar signals from the radar defense system during a major portion of the flight path of the ballistic missile to mask the location of the ballistic missile until it strikes the target area.
Claim 9
Dependent Claim
41 words
The method of claim 5, including the step of: forming perturbations in individual ones of the chaff to produce aerodynamic forces on the chaff at different altitudes to orient the chaff for reflection of the radar signals at the different altitudes.
References Cited (Backward Citations)
US2881425A
Cited
US3023703A
Cited
US3137231A
Cited
US3068472A
Cited
US3143965A
Cited
US3095814A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-09-03 | 1983-03-05 | 1983-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-03 | 1987-03-05 | 1987-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-03 | 1991-03-05 | 1991-09-04 | $7700.00 | Window Closed / Lapsed |