Patent US3853586A successfully refreshed from Google Patents.
US3853586A
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Tapered carbon/pyrolytic graphite composite material
Assignee: Atlantic Research Corp
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Filing: 1968-10-04
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Granted: 1974-12-10
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Expires: 1988-10-04
Abstract
Abstract Improved carbon/pyrolytic graphite composite materials are disclosed which are tapered from center to end. These tapered composites are useful as walls and wall liners for rocket nozzles, thrust chambers, etc.
Inventors
- 👤 E Olcott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:06
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/97; F02K9/974; C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/522; F05; F05D; F05D2250/00; F05D2250/20; F05D2250/29; F05D2250/292; Y; Y10; Y10S; Y10S239/00; Y10S239/19; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
93 words
IN A COMPOSITE MATERIAL OF REDUCED RESIDUAL STRESS AN ANNULAR CARBON SUBSTRATE HAVING AN INNER SURFACE AND A PYROLYTIC GRAPHITE COATING VAPOR DEPOSITED ONTO SAID INNER SURFACE OF SAID SUBSTRATE, SAID COMPOSITE CARBON/PYROLYTIC GRAPHITE MATERIAL HAVING A CENTER PORTION AND TWO END PORTIONS ARRANGED ALONG A LONGITUDINAL AXIS, THE IMPROVEMENT WHEREIN THE CENTER PORTION OF SAID COMPOSITE MATERIAL HAS A THICKNESS NORMAL TO ITS INNER SURFACE WHICH IS GREATER THAN THE THICKNESS AT LEAST ONE OF SAID END PORTIONS, RESULTING IN A TAPER FROM ITS CENTER PORTION TOWARDS SAID AT LEAST ONE END.
Claim 2
Dependent Claim
93 words
IN A COMPOSITE MATERIAL OF REDUCED RESIDUAL STRESS AN ANNULAR CARBON SUBSTRATE HAVING AN INNER SURFACE AND A PYROLYTIC GRAPHITE COATING VAPOR DEPOSITED ONTO SAID INNER SURFACE OF SAID SUBSTRATE, SAID COMPOSITE CARBON/PYROLYTIC GRAPHITE MATERIAL HAVING A CENTER PORTION AND TWO END PORTIONS ARRANGED ALONG A LONGITUDINAL AXIS, THE IMPROVEMENT WHEREIN THE CENTER PORTION OF SAID COMPOSITE MATERIAL HAS A THICKNESS NORMAL TO ITS INNER SURFACE WHICH IS GREATER THAN THE THICKNESS AT LEAST ONE OF SAID END PORTIONS, RESULTING IN A TAPER FROM ITS CENTER PORTION TOWARDS SAID AT LEAST ONE END.
Claim 3
Dependent Claim
11 words
The improvement of claim 1 wherein said carbon substrate comprises graphite.
Claim 4
Dependent Claim
35 words
The improvement of claim 2 wherein said graphite substrate is of substantially uniform thickness and said pyrolytic graphite coating is tapered from its center portion towards said at least one end of said composite material.
Claim 5
Dependent Claim
24 words
The improvement of claim 3 wherein said pyrolytic graphite coating is tapered from its center portion towards both ends of said composite graphite material.
Claim 6
Dependent Claim
35 words
The improvement of claim 1 wherein said pyrolytic graphite coating is of substantially uniform thickness and said carbon substrate is tapered from its center portion towards at least one end of said composite graphitE material.
Claim 7
Dependent Claim
35 words
The improvement of claim 2 wherein said pyrolytic graphite coating is of substantially uniform thickness and said graphite substrate is tapered from its center portion towards at least one end of said composite graphite material.
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) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |