Patent US3081192A successfully refreshed from Google Patents.
US3081192A
Expired / Lapsed
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Method of applying mar-resistant surface coatings to thermoplastic sheets
Assignee: Polaroid Corp
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Filing: 1960-10-10
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Granted: 1963-03-12
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Expires: 1980-10-10
Abstract
No abstract record available.
Inventors
- 👤 Elbert M Idelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:49
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00865; C; C08; C08F; C08F20/00; C08F20/62; C08J; C08J7/00; C08J7/04; C08J7/0427; C08J7/043; C08J7/046; C08J2433/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
IN A PROCESS FOR PRODUCING THERMOPLASTIC SHEETS HAVING MAR-RESISTANT SURFACE COATING, WHEREIN A THIN COATING SOLUTION COMPRISING A POLYMERIZABLE DIESTER OF POLYALKYLENEGYCOL AND AN A,B-UNSATURATED CARBOXYLIC ACID IS APPLIED TO THE SURFACE OF SAID SHEET AND POLYMERIZED IN SITU WHILE THE COATING IS HELD IN CONTACT WITH A HEATED ELEMENT HAVING AN OPTICALLY SMOOTH SURFACE, THE IMPROVEMENT OF USING DI-T-BUTYLPEROXYOXALATE AS THE CATALYST TO EFFECT POLYMERIZATION.
Claim 2
Dependent Claim
66 words
IN A PROCESS FOR PRODUCING THERMOPLASTIC SHEETS HAVING MAR-RESISTANT SURFACE COATING, WHEREIN A THIN COATING SOLUTION COMPRISING A POLYMERIZABLE DIESTER OF POLYALKYLENEGYCOL AND AN A,B-UNSATURATED CARBOXYLIC ACID IS APPLIED TO THE SURFACE OF SAID SHEET AND POLYMERIZED IN SITU WHILE THE COATING IS HELD IN CONTACT WITH A HEATED ELEMENT HAVING AN OPTICALLY SMOOTH SURFACE, THE IMPROVEMENT OF USING DI-T-BUTYLPEROXYOXALATE AS THE CATALYST TO EFFECT POLYMERIZATION.
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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) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |