US2882256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymer of unsaturated polyester, styrene and dibutyl fumarate or dibutyl maleate and process of preparing same
Assignee: Monsanto Chemicals Ltd
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Filing: 1955-12-27
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Granted: 1959-04-14
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Expires: 1975-12-27
Abstract
No abstract record available.
Inventors
- 👤 Walter F Waychoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:18
CPC Classifications
C; C08; C08L; C08L67/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
THE PROCESS WHICH COMPRISES MIXING 100 PARTS BY WEIGHT OF AN UNSATURATED POLYESTER RESIN, 15 TO 75 PARTS BY WEIGHT OS STYRENE, 0.35 TO 2.2 PARTS BY WEIGHT PER UNIT WIGHT OF STYRENE OF A MEMBER OF THE GROUP CONSISTING OF DIBUTYL FUMRATE, DIBUTYL MALEATE, AND MIXTURES THEREOF, AND A CATALYTIC AMOUNT OF AN ORGANIC PERIOXIDE, AND THEREAFTER CURING THE MIXTUARE, THE SAID UNSATURATED POLYESTER RESIN BEING OBTAINED BY CONDENSING SUBSTANTIALLY 50 CHEMICAL EQUIVALENTS OF A DIHYDROXY ALKANE EITH SUBSTANTIALLY 50 CHEMICAL EQUIVALENTS OF A MIXTURE OF A SATURATED ALIPHATIC DICARBOXYLIC ACID AND AN A,BAETHYLENTICALLY UNSATURATED ALIPHATIC DICARBOXYLIC ACID IN WHICH THE LATTER CONSTITUTES 40 TO 80 MOL PERCENT THEREOF.
Claim 2
Dependent Claim
110 words
THE PROCESS WHICH COMPRISES MIXING 100 PARTS BY WEIGHT OF AN UNSATURATED POLYESTER RESIN, 15 TO 75 PARTS BY WEIGHT OS STYRENE, 0.35 TO 2.2 PARTS BY WEIGHT PER UNIT WIGHT OF STYRENE OF A MEMBER OF THE GROUP CONSISTING OF DIBUTYL FUMRATE, DIBUTYL MALEATE, AND MIXTURES THEREOF, AND A CATALYTIC AMOUNT OF AN ORGANIC PERIOXIDE, AND THEREAFTER CURING THE MIXTUARE, THE SAID UNSATURATED POLYESTER RESIN BEING OBTAINED BY CONDENSING SUBSTANTIALLY 50 CHEMICAL EQUIVALENTS OF A DIHYDROXY ALKANE EITH SUBSTANTIALLY 50 CHEMICAL EQUIVALENTS OF A MIXTURE OF A SATURATED ALIPHATIC DICARBOXYLIC ACID AND AN A,BAETHYLENTICALLY UNSATURATED ALIPHATIC DICARBOXYLIC ACID IN WHICH THE LATTER CONSTITUTES 40 TO 80 MOL PERCENT THEREOF.
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) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |