Patent US3722453A successfully refreshed from Google Patents.
Patent US4837250A successfully refreshed from Google Patents.
US4837250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trowelable ablative coating composition and method of use
Assignee: Usbi Booster Production Co Inc
•
Filing: 1988-04-11
•
Granted: 1989-06-06
•
Expires: 2008-04-11
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 21:32
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/22; C08K7/24; C08K7/28; B; B64; B64G; B64G1/00; B64G1/22; B64G1/226; B64G1/52; B64G1/58; C09; C09D; C09D163/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
102 words
A trowelable ablative coating composition for protecting a substrate under high temperature, high velocity, erosive conditions, 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.
Claim 2
Dependent Claim
102 words
A trowelable ablative coating composition for protecting a substrate under high temperature, high velocity, erosive conditions, 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.
Claim 3
Dependent Claim
40 words
The trowelable ablative 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 between about 0.185g/cm 3 and about 0.195g/cm 3 .
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) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |