US2806835A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diisocyanate modified polyester resin and process of making same
Assignee: Bayer AG
•
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 20:00
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
94 words
A PROCESS FOR THE PRODUCTION OF POLYESTER COPOLYMERS WHICH COMPRISES REACTING (A) AN ISOCYANATE-MODIFIED POLYESTER OF A MOLECULAR WEIGHT AT LEAST 500, PREPARED BY REACTING A SATURATED DIHYDRIC ALCOHOL AND A DICARBOXYLIC ACID REACTANT DEVOID OF ALIPHATIC UNSATURATION, FOLLOWED BY CONDENSATION WITH AN EXCESS OF ORGANIC DIISOYANATE, WITH (B) AN ORGANIC COMPOUND CAPABLE OF UNDERGOING POLYMERIZATIN REACTIONS AND CONTAINING AT LEAST ONE ACTIVE ETHYLENIC DOUBLE LINKAGE AND AT LEAST 2 HYDROGEN ATOMS CAPABLE OF REACTING WITH ISOCYANATES TO THEREBY PRODUCE AN UNSATURATED POLYESTER, AND CONDENSING SAID UNSATURATED POLYESTER WITH STYRENE TO FORM A COPOLYMER.
Claim 2
Dependent Claim
94 words
A PROCESS FOR THE PRODUCTION OF POLYESTER COPOLYMERS WHICH COMPRISES REACTING (A) AN ISOCYANATE-MODIFIED POLYESTER OF A MOLECULAR WEIGHT AT LEAST 500, PREPARED BY REACTING A SATURATED DIHYDRIC ALCOHOL AND A DICARBOXYLIC ACID REACTANT DEVOID OF ALIPHATIC UNSATURATION, FOLLOWED BY CONDENSATION WITH AN EXCESS OF ORGANIC DIISOYANATE, WITH (B) AN ORGANIC COMPOUND CAPABLE OF UNDERGOING POLYMERIZATIN REACTIONS AND CONTAINING AT LEAST ONE ACTIVE ETHYLENIC DOUBLE LINKAGE AND AT LEAST 2 HYDROGEN ATOMS CAPABLE OF REACTING WITH ISOCYANATES TO THEREBY PRODUCE AN UNSATURATED POLYESTER, AND CONDENSING SAID UNSATURATED POLYESTER WITH STYRENE TO FORM A COPOLYMER.
References Cited (Backward Citations)
US2577281A
Cited
US2639252A
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 |