US2941976A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymers of polyesters and oxygencontaining vinyl compounds
Assignee: Aerojet Rocketdyne Inc
•
Filing: 1950-12-14
•
Granted: 1960-06-21
•
Expires: 1970-12-14
Abstract
No abstract record available.
Inventors
- 👤 Philipson Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:17
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/52; C08L; C08L67/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
A COPOLYMER CONSISTING OF A POLYESTER OBTAINED BY CONDENSING A SUBSTANCE FROM THE GROUP CONSISTING OF AN ALKANE DICARBOXYLIC ACID AND MIXTURES OF ALKANE DICARBOXYLIC ACIDS WITH A DIHYDROXY ALCOHOL IN THE PRESENCE OF 4 TO 6 MOLE PERCENT BASED ON THE WEIGHT OF THE TOTAL POLYESTER OF AN UNSATURATED COMPOUND SELECTED FROM THE GROUP CONSISTING OF UNSATURATED DICARBOXYLIC ACIDS IN WHICH A DOUBLE BOND OCCURS BETWEEN ALIPHATIC CARBON ATOMS AND UNSATURATED HYDROXY ACIDS IN WHICH A DOUBLE BOND OCCURS BETWEEN ALIPHATIC CARBON ATOMS, SAID POLYESTER BEING COPOLYMERIZED WITH FROM 60 TO 85% BY WEIGHT BASED ON THE WEIGHT OF THE TOTAL COPOLYMER OF A VINYL MONOMER HAVING OXYGEN IN THE MOLECULE, AND MIXTURES THEREOF COMPATIBLE WITH SAID POLYESTER RESIN, THE POLYESTER BEING PRESENT IN AN AMOUNT VARYING BETWEEN 40% TO 15% BY WEIGHT BASED ON THE WEIGHT OF THE TOTAL POLYMER, SAID COPOLYMERIZATION TAKING PLACE IN THE PRESENCE OF ABOUT 0.5% TO 2% BY WEIGHT BASED ON THE WEIGHT OF THE TOTAL COPOLYMER OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORGANIC PERESTERS AND PEROXIDES.
Claim 2
Dependent Claim
177 words
A COPOLYMER CONSISTING OF A POLYESTER OBTAINED BY CONDENSING A SUBSTANCE FROM THE GROUP CONSISTING OF AN ALKANE DICARBOXYLIC ACID AND MIXTURES OF ALKANE DICARBOXYLIC ACIDS WITH A DIHYDROXY ALCOHOL IN THE PRESENCE OF 4 TO 6 MOLE PERCENT BASED ON THE WEIGHT OF THE TOTAL POLYESTER OF AN UNSATURATED COMPOUND SELECTED FROM THE GROUP CONSISTING OF UNSATURATED DICARBOXYLIC ACIDS IN WHICH A DOUBLE BOND OCCURS BETWEEN ALIPHATIC CARBON ATOMS AND UNSATURATED HYDROXY ACIDS IN WHICH A DOUBLE BOND OCCURS BETWEEN ALIPHATIC CARBON ATOMS, SAID POLYESTER BEING COPOLYMERIZED WITH FROM 60 TO 85% BY WEIGHT BASED ON THE WEIGHT OF THE TOTAL COPOLYMER OF A VINYL MONOMER HAVING OXYGEN IN THE MOLECULE, AND MIXTURES THEREOF COMPATIBLE WITH SAID POLYESTER RESIN, THE POLYESTER BEING PRESENT IN AN AMOUNT VARYING BETWEEN 40% TO 15% BY WEIGHT BASED ON THE WEIGHT OF THE TOTAL POLYMER, SAID COPOLYMERIZATION TAKING PLACE IN THE PRESENCE OF ABOUT 0.5% TO 2% BY WEIGHT BASED ON THE WEIGHT OF THE TOTAL COPOLYMER OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ORGANIC PERESTERS AND PEROXIDES.
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) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |