Patent US3836967A successfully refreshed from Google Patents.
US3836967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Broadband microwave energy absorptive structure
Assignee: Individual
•
Filing: 1962-05-28
•
Granted: 1974-09-17
•
Expires: 1982-05-28
Abstract
Abstract The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.
Inventors
- 👤 R Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:30
CPC Classifications
H; H01; H01Q; H01Q17/00; H01Q17/008
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
34 words
A microwave radiation absorber comprising a plurality of uniform, hollow, tapered projections contiguously disposed over an area, said projections being formed of a conductive sheet composed of conducting particles dispersed in a flexible medium.
Claim 2
Dependent Claim
34 words
A microwave radiation absorber comprising a plurality of uniform, hollow, tapered projections contiguously disposed over an area, said projections being formed of a conductive sheet composed of conducting particles dispersed in a flexible medium.
Claim 3
Dependent Claim
51 words
A microwave radiation absorber comprising a plurality of uniform, hollow, tapered projections contiguously disposed over an area, said projections being formed of a conductive sheet having a thickness in the range of from about 0.008 to about 0.045 inch, said sheet being composed of conducting particles dispersed in a flexible medium.
Claim 4
Dependent Claim
51 words
A microwave radiation absorber comprising a plurality of uniform, hollow, tapered projections contiguously disposed over an area, said projections being formed of a conductive sheet having a thickness in the range of from about 0.008 to about 0.045 inch, said sheet being composed of conducting particles dispersed in a flexible medium.
Claim 5
Dependent Claim
49 words
A microwave radiation absorber comprising a plurality of uniform, hollow, tapered projections contiguously disposed over an area, said projections being formed of a conductive sheet having a thickness in the range of from about 0.008 to about 0.045 inch, said sheet being composed of carbon particles dispersed in rubber.
Claim 6
Dependent Claim
49 words
A microwave radiation absorber comprising a plurality of uniform, hollow, tapered projections contiguously disposed over an area, said projections being formed of a conductive sheet having a thickness in the range of from about 0.008 to about 0.045 inch, said sheet being composed of carbon particles dispersed in rubber.
Claim 7
Dependent Claim
48 words
A microwave radiation absorber comprising a plurality of uniform, hollow, pyramids contiguously disposed over an area, said pyramids being formed of a conductive sheet having a thickness in the range of from about 0.008 to about 0.045 inch, said sheet being composed of carbon particles dispersed in neoprene.
Claim 8
Dependent Claim
48 words
A microwave radiation absorber comprising a plurality of uniform, hollow, pyramids contiguously disposed over an area, said pyramids being formed of a conductive sheet having a thickness in the range of from about 0.008 to about 0.045 inch, said sheet being composed of carbon particles dispersed in neoprene.
Claim 9
Dependent Claim
48 words
A microwave radiation absorber comprising a plurality of uniform, hollow pyramids contiguously disposed over an area, said pyramids being formed of a conductive sheet having a thickness in the range of from about 0.01 to about 0.02 inch, said sheet being composed of carbon particles dispersed in neoprene.
Claim 10
Dependent Claim
48 words
A microwave radiation absorber comprising a plurality of uniform, hollow pyramids contiguously disposed over an area, said pyramids being formed of a conductive sheet having a thickness in the range of from about 0.01 to about 0.02 inch, said sheet being composed of carbon particles dispersed in neoprene.
Claim 11
Dependent Claim
56 words
A microwave radiation absorber comprising a plurality of uniform, hollow pyramids contiguously disposed over an area, said pyramids being formed of a conducting sheet having a thickness in the range of from about 0.01 to about 0.02 inch, said sheet being composed of about 10 to 20 percent by weight of carbon particles dispersed in neoprene.
Claim 12
Dependent Claim
56 words
A microwave radiation absorber comprising a plurality of uniform, hollow pyramids contiguously disposed over an area, said pyramids being formed of a conducting sheet having a thickness in the range of from about 0.01 to about 0.02 inch, said sheet being composed of about 10 to 20 percent by weight of carbon particles dispersed in neoprene.
Claim 13
Dependent Claim
65 words
A microwave radiation absorber comprising a plurality of uniform hollow pyramids contiguously disposed over an area, said pyramids being formed of a rubber sheet having a thickness in the range of from about 0.01 to about 0.02 inch, the face surface of said sheet comprising 20 to 30 percent by weight of finely divided carbon particles to a depth therein approximately 0.003 to 0.005 inch.
Claim 14
Dependent Claim
65 words
A microwave radiation absorber comprising a plurality of uniform hollow pyramids contiguously disposed over an area, said pyramids being formed of a rubber sheet having a thickness in the range of from about 0.01 to about 0.02 inch, the face surface of said sheet comprising 20 to 30 percent by weight of finely divided carbon particles to a depth therein approximately 0.003 to 0.005 inch.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |