US2885373A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resins comprising polyesters modified by dextran and a monoethylenically unsaturated monomer
Assignee: Commonwealth Engineering Company of Ohio
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Filing: 1955-01-19
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Granted: 1959-05-05
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Expires: 1975-01-19
Abstract
No abstract record available.
Inventors
- 👤 Leo J Novak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:32
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; C08G63/668; C08G63/676; C08B; C08B37/00; C08B37/0006; C08B37/0009; C08B37/0021; C08G63/91; C08G63/914; C08G63/918; C08L; C08L51/00; C08L51/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A REACTION PRODUCT PREPARED BY ADMIXING AND HEATING A POLYESTER AND AN ETHYLENICALLY UNSATURATED COMPOUND SELECTED FROM THE GROUP CONSISTING OF STYRENE, DIVINYL BENZENE, METHYLMETHACRYLAE, VINYL ACETATE AND DIALLYL PHTHALATE, SAID POLYESTER BEING PREPARD BY HEATING TOGETHER A MIXTURE CONSISTING OF 30 TO 65% BY WEIGHT OF A OLYCARBOXYLIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF MALEIC AND PHTHALIC ACID AND THEIR ANHYDRIDES, FROM 15 TO 50% BY WEIGHT OF A POLYHYDIC ALCOHOL, AND FROM 5 TO 25% BY WEIGHT OF DEXTRAN TO OBTAIN A DEXTRAN-MODIFIED POLYESTER REATION PRODUCT.
Claim 2
Dependent Claim
89 words
A REACTION PRODUCT PREPARED BY ADMIXING AND HEATING A POLYESTER AND AN ETHYLENICALLY UNSATURATED COMPOUND SELECTED FROM THE GROUP CONSISTING OF STYRENE, DIVINYL BENZENE, METHYLMETHACRYLAE, VINYL ACETATE AND DIALLYL PHTHALATE, SAID POLYESTER BEING PREPARD BY HEATING TOGETHER A MIXTURE CONSISTING OF 30 TO 65% BY WEIGHT OF A OLYCARBOXYLIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF MALEIC AND PHTHALIC ACID AND THEIR ANHYDRIDES, FROM 15 TO 50% BY WEIGHT OF A POLYHYDIC ALCOHOL, AND FROM 5 TO 25% BY WEIGHT OF DEXTRAN TO OBTAIN A DEXTRAN-MODIFIED POLYESTER REATION PRODUCT.
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) | 1962-05-04 | 1962-11-03 | 1963-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-04 | 1966-11-03 | 1967-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-04 | 1970-11-03 | 1971-05-05 | $7700.00 | Window Closed / Lapsed |