US3245941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes from polyisocyanates and copolymers of hydroxyalkyl acrylates, alkyl acylates, and vinyl benzenes
Assignee: Bayer AG
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Filing: 1963-03-20
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Granted: 1966-04-12
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Expires: 1983-03-20
Abstract
No abstract record available.
Inventors
- 👤 Mayer Rudi
- 👤 Kolb Gunter
- 👤 Bayer Otto
- 👤 Gruber Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:02
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6216; C08G18/622; C08G18/6225; C08G18/6229; C08F; C08F8/00; C08F8/30; C08F2800/00; C08F2800/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A POLYURETHANE COATING COMPOSITION WHICH COMPRISES AN INERT ORGANIC SOLVENT SOLUTION OF THE REACTION PRODUCT PREPARED BY A PROCESS WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE WITH A SULPHUR FREE COPOLYMER PREPARED FROM A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROXY ALKYL ACRYLATE AND METHACRYLATE, SAID ALKYL GROUP CONTAINING 2 TO 12 CARBON ATOMS, WITH A VINYL BENZENE AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALKYL ACRYLATE AND ALKYL METHACRYLATE WHEREIN THE ALKYL GROUP HAS FROM 1 TO 12 CARBON ATOMS, SAID COPOLYMER HAVING FROM 0.1 TO 10% BY WEIGHT OF FREE HYDROXYL GROUPS AND HAVING BEEN PREPARED IN THE PRESENCE OF A SULPHUR FREE MOLECULAR WEIGHT REGULATOR.
Claim 2
Dependent Claim
110 words
A POLYURETHANE COATING COMPOSITION WHICH COMPRISES AN INERT ORGANIC SOLVENT SOLUTION OF THE REACTION PRODUCT PREPARED BY A PROCESS WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE WITH A SULPHUR FREE COPOLYMER PREPARED FROM A MEMBER SELECTED FROM THE GROUP CONSISTING OF HYDROXY ALKYL ACRYLATE AND METHACRYLATE, SAID ALKYL GROUP CONTAINING 2 TO 12 CARBON ATOMS, WITH A VINYL BENZENE AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF ALKYL ACRYLATE AND ALKYL METHACRYLATE WHEREIN THE ALKYL GROUP HAS FROM 1 TO 12 CARBON ATOMS, SAID COPOLYMER HAVING FROM 0.1 TO 10% BY WEIGHT OF FREE HYDROXYL GROUPS AND HAVING BEEN PREPARED IN THE PRESENCE OF A SULPHUR FREE MOLECULAR WEIGHT REGULATOR.
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) | 1969-04-11 | 1969-10-11 | 1970-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-11 | 1973-10-11 | 1974-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-11 | 1977-10-11 | 1978-04-12 | $7700.00 | Window Closed / Lapsed |