US2806836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diisocyanate modified polyester copolymer and process of making same
Assignee: Bayer AG
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Filing: 1953-10-06
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Granted: 1957-09-17
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Expires: 1973-10-06
Abstract
No abstract record available.
Inventors
- 👤 Nischk Gunther
- 👤 Karl E Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:48
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/68; C08F; C08F290/00; C08F290/08; C08F290/14; C08F290/141; C08G18/675; C08G18/70; C08G18/81; C08G18/8141; C08G18/815
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
PROCESS FOR THE PRODUCTION OF POLYESTER COPOLYMERS, WHICH COMPRISES REACTING A NON-POLYMERIZABLE LINEAR POLYESTER, SAID POLYESTER BEING A CONDENSATION PRODUCT OF A SATURATED DIHYDRIC ALCOHOL AND A DICARBOXYLIC ACID REACTANT DEVOID OF ALIPHATIC UNSATURATION, OF A MOLECULAR WEIGHT OF AT LEAST 500 AND HAVING FREE HYDROXYL GROUPS WITH AN UNSATURATED ORGANIC ISOCYANATE CONTAINING THE GROUP =C=C= IN AN ALIPHATIC LINKAGE AND HAVING THE ISOCYANATE GROUP AT LEAST TWICE IN THE MOLECULE, AND REACTING THE RESULTING ADDITION PRODUCT WITH A VINYLIDENE COMPOUND IN THE PRESENCE OF A PEROXIDE.
Claim 2
Dependent Claim
87 words
PROCESS FOR THE PRODUCTION OF POLYESTER COPOLYMERS, WHICH COMPRISES REACTING A NON-POLYMERIZABLE LINEAR POLYESTER, SAID POLYESTER BEING A CONDENSATION PRODUCT OF A SATURATED DIHYDRIC ALCOHOL AND A DICARBOXYLIC ACID REACTANT DEVOID OF ALIPHATIC UNSATURATION, OF A MOLECULAR WEIGHT OF AT LEAST 500 AND HAVING FREE HYDROXYL GROUPS WITH AN UNSATURATED ORGANIC ISOCYANATE CONTAINING THE GROUP =C=C= IN AN ALIPHATIC LINKAGE AND HAVING THE ISOCYANATE GROUP AT LEAST TWICE IN THE MOLECULE, AND REACTING THE RESULTING ADDITION PRODUCT WITH A VINYLIDENE COMPOUND IN THE PRESENCE OF A PEROXIDE.
References Cited (Backward Citations)
US2503209A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |