US3051679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester resins
Assignee: Rohm and Haas Co
•
Filing: 1960-12-12
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Granted: 1962-08-28
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Expires: 1980-12-12
Abstract
No abstract record available.
Inventors
- 👤 George E Forsyth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:49
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/02; F23N5/10; F23N5/107; B; B29; B29C; B29C70/00; B29C70/04; B29C70/06; B29C70/10; B29C70/12; C; C08; C08F; C08F265/00; C08F265/04; C08L; C08L67/00; C08L67/06; B29K; B29K2105/00; B29K2105/06; B29K2105/12; B29K2105/128; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/24994
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
A PROCESS FOR PREPARING FIBER-REINFORCED PLASTIC OBJECTS, WHICH COMPRISES FORMING A MAT OF FIBERS, MIXING A FIRST SOLUTION OF A POLYESTER HAVING UNITS FROM A DIHYDRIC ALCOHOL AND FROM AN A,B-ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID IN POLYMERIZABLE MONOMER HAVING A VINYLIDENE GROUP, CH2=C<. AND A SECOND SOLUTION CONTAINING POLYMERIZABLE POLYESTER HAVING UNITS FROM A DIHYDRIC ALCOHOL AND FROM AN A,B-UNSATURATED DICARBOXYLIC ACID IN A MONOMER HAVING A VINYLIDENE GROUP, ONE OF SAID SOLUTIONS HAVING DISSOLVED THEREIN A SMALL PROPORTION OF ISOTACTIC POLY(METHYL METHACRYLATE) AND THE OTHER SOLUTION HAVING DISSOLVED THEREIN A SMALL PROPORTION OF SYNDIOTACTIC POLY(METHYL METHACRYLATE), AT LEAST ONE OF SAID SOLUTIONS CONTAINING A POLYMERIZATION INITIATOR, APPLYING THE RESULTANT MIXTURE, WHILE STILL FLUID, TO SAID MAT, WHEREUPON SAID MIXTURE FORMS A GEL, AND INITIATING POLYMERIZATION OF SAID MIXTURE AT A TEMPERATURE BELOW THE MELTING OF SAID GEL.
Claim 2
Dependent Claim
137 words
A PROCESS FOR PREPARING FIBER-REINFORCED PLASTIC OBJECTS, WHICH COMPRISES FORMING A MAT OF FIBERS, MIXING A FIRST SOLUTION OF A POLYESTER HAVING UNITS FROM A DIHYDRIC ALCOHOL AND FROM AN A,B-ETHYLENICALLY UNSATURATED DICARBOXYLIC ACID IN POLYMERIZABLE MONOMER HAVING A VINYLIDENE GROUP, CH2=C<. AND A SECOND SOLUTION CONTAINING POLYMERIZABLE POLYESTER HAVING UNITS FROM A DIHYDRIC ALCOHOL AND FROM AN A,B-UNSATURATED DICARBOXYLIC ACID IN A MONOMER HAVING A VINYLIDENE GROUP, ONE OF SAID SOLUTIONS HAVING DISSOLVED THEREIN A SMALL PROPORTION OF ISOTACTIC POLY(METHYL METHACRYLATE) AND THE OTHER SOLUTION HAVING DISSOLVED THEREIN A SMALL PROPORTION OF SYNDIOTACTIC POLY(METHYL METHACRYLATE), AT LEAST ONE OF SAID SOLUTIONS CONTAINING A POLYMERIZATION INITIATOR, APPLYING THE RESULTANT MIXTURE, WHILE STILL FLUID, TO SAID MAT, WHEREUPON SAID MIXTURE FORMS A GEL, AND INITIATING POLYMERIZATION OF SAID MIXTURE AT A TEMPERATURE BELOW THE MELTING OF SAID GEL.
References Cited (Backward Citations)
US2340109A
Cited
US2631955A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-27 | 1966-02-26 | 1966-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-27 | 1970-02-26 | 1970-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-27 | 1974-02-26 | 1974-08-28 | $7700.00 | Window Closed / Lapsed |