Patent US3012952A successfully refreshed from Google Patents.
US3012952A
Expired / Lapsed
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Process for preparing photopoly-merizable compositions
Assignee: EIDP Inc
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Filing: 1959-08-31
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Granted: 1961-12-12
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Expires: 1979-08-31
Abstract
No abstract record available.
Inventors
- 👤 Smith Charles Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:55
CPC Classifications
C; C08; C08B; C08B3/00; C08B3/12; C08B15/00; C08B3/22; C08F; C08F2/00; C08F2/46; C08F251/00; C08F251/02; C08L; C08L1/00; C08L1/08; C08L1/10; G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/032; G03F7/0325
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
105 words
A PROCESS FOR MAKING AN ADDITION POLYMERIZABLE COMPOSITION CONTAINING A CELLULOSE MIXED ESTER AND SIMULTANEOUSLY FORMING SAID ESTER WHICH COMPRISES ADMIXING (1) FINELY DIVIDED PARTICLES CAPABLE OF PASSING THROUGH A SCREEN HAVING UNIFORM OPENINGS NOT GREATER THAN 0.027 INCH IN THEIR LARGEST DIMENSION OF A CELLULOSE PARTIAL ESTER OF AT LEAST ONE SATURATED ALIPHATIC MONOCARBOXYLIC ACID OF 2 TO 4 CARBON ATOMS, (2) A DICARBOXYLIC ACID ANHYDRIDE AND (3) A NON-GASEOUS ADDITION-POLYMERIZABLE ETHYLENICALLY UNSATURATED COMPOUND, HEATING THE CONSTITUENTS WHILE MIXING AT A TEMPERATURE FROM 85*C. TO 185* C., ADMIXING AN ESTERIFICATION CATALYST AND MAINTAINING ALL OF SAID CONSTITUENTS AT SAID TEMPERATURE UNTIL ESTERIFICATION IS ESSENTIALLY-COMPLETE.
Claim 2
Dependent Claim
105 words
A PROCESS FOR MAKING AN ADDITION POLYMERIZABLE COMPOSITION CONTAINING A CELLULOSE MIXED ESTER AND SIMULTANEOUSLY FORMING SAID ESTER WHICH COMPRISES ADMIXING (1) FINELY DIVIDED PARTICLES CAPABLE OF PASSING THROUGH A SCREEN HAVING UNIFORM OPENINGS NOT GREATER THAN 0.027 INCH IN THEIR LARGEST DIMENSION OF A CELLULOSE PARTIAL ESTER OF AT LEAST ONE SATURATED ALIPHATIC MONOCARBOXYLIC ACID OF 2 TO 4 CARBON ATOMS, (2) A DICARBOXYLIC ACID ANHYDRIDE AND (3) A NON-GASEOUS ADDITION-POLYMERIZABLE ETHYLENICALLY UNSATURATED COMPOUND, HEATING THE CONSTITUENTS WHILE MIXING AT A TEMPERATURE FROM 85*C. TO 185* C., ADMIXING AN ESTERIFICATION CATALYST AND MAINTAINING ALL OF SAID CONSTITUENTS AT SAID TEMPERATURE UNTIL ESTERIFICATION IS ESSENTIALLY-COMPLETE.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |