Patent US3053503A successfully refreshed from Google Patents.
Patent US2923673A successfully refreshed from Google Patents.
US2923673A
Expired / Lapsed
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Preparation of photopolymerizable compounds
Assignee: EIDP Inc
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Filing: 1958-05-21
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Granted: 1960-02-02
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Expires: 1978-05-21
Abstract
No abstract record available.
Inventors
- 👤 Munger Stanley Hiram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:40
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/032; G03F7/0325; C; C08; C08B; C08B15/00; C08B3/00; C08B3/16; C08F; C08F2/00; C08F2/46; C08F251/00; C08F251/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A PROCESS FOR MAKING AN ADDITION POLYMERIZABLE COMPOSITION CONTAINING A CELLULOSE MIXED ESTER AND SIMULTANEOUSLY FORMING SAID ESTER WHICH COMPRISES ADMIXING A CELLULOSE PARTIAL ESTER OF A SATURATED ALIPHATIC MONOCARBOXYLIC ACID OF 2 TO 4 CARBON ATOMS, A DICARBOXYLIC ACID ANHYDRIDE, AN ADDITION POLYMERIZABLE ETHYLENICALLY UNSATURATED COMPOUND, AN ESTERIFICATION CATALYST, AND HEATING THE ADMIXTURE TO A TEMPERATURE FROM 85*C. TO 180*C. WHILE MAINTAINING THE SAME FOR A PERIOD OF 0.5 TO 60 MINUTES WHEREBY ESTERIFICATION OF SAID PARTIAL ESTER OCCURS AND ADMIXING AN ADDITION POLYMERIZATION INITIATOR ACTIVATED BY ACTINIC LIGHT AND HAVING NO SIGNIFICANT THERMAL ACTIVITY AT THE ESTERIFICATION TEMPERATURE AT ANY STAGE OF THE PROCESS INCLUDING THAT AT WHICH ESTERIFICATION OCCURS AND THAT SUBSEQUENT TO ESTERFICATION.
Claim 2
Dependent Claim
117 words
A PROCESS FOR MAKING AN ADDITION POLYMERIZABLE COMPOSITION CONTAINING A CELLULOSE MIXED ESTER AND SIMULTANEOUSLY FORMING SAID ESTER WHICH COMPRISES ADMIXING A CELLULOSE PARTIAL ESTER OF A SATURATED ALIPHATIC MONOCARBOXYLIC ACID OF 2 TO 4 CARBON ATOMS, A DICARBOXYLIC ACID ANHYDRIDE, AN ADDITION POLYMERIZABLE ETHYLENICALLY UNSATURATED COMPOUND, AN ESTERIFICATION CATALYST, AND HEATING THE ADMIXTURE TO A TEMPERATURE FROM 85*C. TO 180*C. WHILE MAINTAINING THE SAME FOR A PERIOD OF 0.5 TO 60 MINUTES WHEREBY ESTERIFICATION OF SAID PARTIAL ESTER OCCURS AND ADMIXING AN ADDITION POLYMERIZATION INITIATOR ACTIVATED BY ACTINIC LIGHT AND HAVING NO SIGNIFICANT THERMAL ACTIVITY AT THE ESTERIFICATION TEMPERATURE AT ANY STAGE OF THE PROCESS INCLUDING THAT AT WHICH ESTERIFICATION OCCURS AND THAT SUBSEQUENT TO ESTERFICATION.
References Cited (Backward Citations)
US2336985A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-01 | 1963-08-03 | 1964-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-01 | 1967-08-03 | 1968-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-01 | 1971-08-03 | 1972-02-02 | $7700.00 | Window Closed / Lapsed |