Patent US4772495A successfully refreshed from Google Patents.
US4772495A
Expired / Lapsed
US
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Trowelable ablative coating composition and method of use
Assignee: USBI BOOSTER PRODUCTION COMPANY Inc HUNTSVILLE ALABAMA A CORP OF
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Filing: 1987-07-23
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Granted: 1988-09-20
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Expires: 2007-07-23
Abstract
Abstract A trowelable ablative coating composition is disclosed. The composition comprises an epoxy resin, an amide curing agent, glass microspheres and ground cork. A method for protecting a substrate is also disclosed. The method comprises applying the trowelable ablative coating discussed above to a substrate and curing the coating composition.
Inventors
- 👤 Stephen E. Headrick
- 👤 Roger L. Hill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:40
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/22; C08K7/24; C08K7/28; B; B64; B64G; B64G1/00; B64G1/22; B64G1/226; C09; C09D; C09D163/00; B64G1/52; B64G1/58; Y; Y10; Y10S; Y10S521/00; Y10S521/907
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
113 words
A method of protecting a substrate under high temperature, high velocity, erosive conditions, comprising applying to the substrate a trowelable ablative coating composition consisting essentially of about 67 weight percent to about 73 weight percent of a mixture of an epoxy resin consisting of an epichlorohydrin/bisphenol A reaction product and an amide curing agent wherein the quantity by weight of the amide curing agent is equal to the quantity by weight of the epoxy resin multiplied by a factor between about 0.97 and about 1.03, about 22 weight percent to about 28 weight percent hollow glass microspheres, and about 4.5 weight percent to about 5.5 weight percent ground cork, and curing the composition.
Claim 2
Independent Claim
113 words
A method of protecting a substrate under high temperature, high velocity, erosive conditions, comprising applying to the substrate a trowelable ablative coating composition consisting essentially of about 67 weight percent to about 73 weight percent of a mixture of an epoxy resin consisting of an epichlorohydrin/bisphenol A reaction product and an amide curing agent wherein the quantity by weight of the amide curing agent is equal to the quantity by weight of the epoxy resin multiplied by a factor between about 0.97 and about 1.03, about 22 weight percent to about 28 weight percent hollow glass microspheres, and about 4.5 weight percent to about 5.5 weight percent ground cork, and curing the composition.
Claim 3
Dependent Claim
40 words
The method of claim 1 wherein the glass microspheres comprise sodium borosilicate glass microspheres having a diameter between about 20 microns and about 200 microns and a bulk density of about 0.158 g/cm 3 and about 0.195 g/cm 3 .
References Cited (Backward Citations)
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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) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |