US4868056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oxygen protection system for carbon
Assignee: Avcarb Material Solutions Inc
•
Filing: 1988-02-01
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Granted: 1989-09-19
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Expires: 2008-02-01
Abstract
Abstract The invention deals with an oxidation protection system for an inhibited carbon substrate which comprises a friable layer applied to the carbon substrate surface. The friable layer is then coated with a dense oxidation resistant outer layer.
Inventors
- 👤 Michael H. Haselkorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:19
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C04B41/45; C04B41/52; C04B41/80; C04B41/81; C04B41/89; Y; Y10; Y10T; Y10T428/00; Y10T428/30
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
42 words
An oxidation protective coating for a carbon substrate comprising a friable layer of a compatible material on the surface of the carbon substrate and a dense layer of a material which is stable at high operating temperatures deposited on the friable layer.
Claim 2
Dependent Claim
42 words
An oxidation protective coating for a carbon substrate comprising a friable layer of a compatible material on the surface of the carbon substrate and a dense layer of a material which is stable at high operating temperatures deposited on the friable layer.
Claim 3
Dependent Claim
13 words
A coating as defined in claim 1, where the carbon substrate is inhibited.
Claim 4
Dependent Claim
22 words
A coating as defined in claim 1, where the friable layer is boron carbide and the the dense layer is silicon carbide.
Claim 5
Dependent Claim
18 words
A coating as defined in claim 3 where the carbon substrate is inhibited with a source of boron.
Claim 6
Dependent Claim
40 words
An oxidation protection system for a porous carbon substate comprising an inhibiter within the pores of the carbon substrate, a friable coating on the surface of the carbon substrate, and a dense oxidation stable outer coating on the friable coating.
Claim 7
Dependent Claim
40 words
An oxidation protection system for a porous carbon substate comprising an inhibiter within the pores of the carbon substrate, a friable coating on the surface of the carbon substrate, and a dense oxidation stable outer coating on the friable coating.
Claim 8
Dependent Claim
19 words
An oxidation protection system as described in claim 5 where the friable coating is a porous boron carbide coating.
Claim 9
Dependent Claim
24 words
An oxidation protection system as described in claim 5 where the inhibiter is a source of boron and the friable coating is boron carbide.
Claim 10
Dependent Claim
16 words
An oxidation frotection system as described in claim 7 where the outer coating is silicon carbide.
References Cited (Backward Citations)
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US3131089A
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US3914508A
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US3936574A
Cited
US4476164A
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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) | 1992-09-18 | 1993-03-20 | 1993-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-18 | 1997-03-20 | 1997-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-18 | 2001-03-20 | 2001-09-19 | $7700.00 | Window Closed / Lapsed |