Patent US3656994A successfully refreshed from Google Patents.
US3656994A
Expired / Lapsed
US
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Oxybenzoyl polyester coatings
Assignee: BP Corp North America Inc
•
Filing: 1969-05-28
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Granted: 1972-04-18
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Expires: 1989-05-28
Abstract
Abstract A process for reducing the porosity of an oxybenzoyl polyester film by subjecting the surface of the film to a shearing action.
Inventors
- 👤 James Economy
- 👤 Steve G Cottis
- 👤 Bernard E Nowak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:42
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/02; B05D1/08; B05D1/10; B05D1/40; B05D3/00; B05D3/12; C; C08; C08J; C08J7/00; C08J7/12; C08J7/123; C08L; C08L67/00; C08L67/04; C09; C09D; C09D167/00; C09D167/04; B05D2508/00; C08J2367/00; C08J2367/02; C08J2367/03; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
13 words
A process as set forth in claim 1 wherein said substrate is metal.
Claim 2
Dependent Claim
23 words
A process as set forth in claim 2 wherein said porous film is formed by flame spraying said oxybenzoyl polyester on said substrate.
Claim 3
Dependent Claim
23 words
A process as set forth in claim 2 wherein said porous film is formed by plasma spraying said oxybenzoyl polyester on said substrate.
Claim 4
Dependent Claim
15 words
A process as set forth in claim 1 wherein said oxybenzoyl polyester has the formula
Claim 5
Dependent Claim
21 words
A process as set forth in claim 5 wherein R1 is selected from the group consisting of lower alkanoyl and hydrogen.
Claim 6
Dependent Claim
12 words
A process as set forth in claim 5 wherein R1 is hydrogen.
Claim 7
Dependent Claim
34 words
A process as set forth in claim 1 wherein said oxybenzoyl polyester has a molecular weight of from 3,500 to 25,000 and consists essentially of recurring structural units of Formulas I, III and IV.
Claim 8
Dependent Claim
12 words
A process as set forth in claim 8 wherein m is 0.
Claim 9
Dependent Claim
12 words
A process as set forth in claim 8 wherein n is 0.
Claim 10
Dependent Claim
20 words
A process as set forth in claim 8 wherein said oxybenzoyl polyester consists essentially of recurring units of the formula
References Cited (Backward Citations)
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Cited
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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) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |