Patent US2445160A successfully refreshed from Google Patents.
Patent US3360495A successfully refreshed from Google Patents.
US3360495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes
Assignee: Bayer AG
•
Filing: 1964-02-06
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Granted: 1967-12-26
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Expires: 1984-02-06
Abstract
No abstract record available.
Inventors
- 👤 Muller Erwin
- 👤 Dietrich Dieter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:43
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/38; C08G18/3855; C08G18/3863; C08G18/3865; C08G18/08; C08G18/0838; C08G18/0842; C08G18/0861; C08G18/0871; C08G18/0876; C08G18/32; C08G18/3203; C08G18/3271; C08L; C08L75/00; C08L75/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A METHOD FOR MAKING A STABLE DISPERSION OF A POLYURETHANE WHICH COMPRISES MIXING TOGETHER A DI-(PRIMARY HYDROXY) ALCOHOL AND A DI(SECONDARY HYDROXY) ALCOHOL AND AN ORGANIC DIISOCYANATE IN AN AMOUNT UP TO THE STOICHIOMETRIC EQUIVALENT OF SAID DI(PRIMARY HYDROXY) ALCOHOL, WHEREBY SAID DI(PRIMARY HYDROXY) ALCOHOL REACTS PREFERENTIALLY WITH THE ORGANIC DIISOCYANATE TO FORM A POLYURETHANE WHICH PRECIPITATES FROM SOLUTION FORMING A DISPERSION IN SAID DI(SECONDARY HYDROXY) ALCOHOL WHICH DOES NOT SETTLE OUT UPON STANDING.
Claim 2
Independent Claim
74 words
A METHOD FOR MAKING A STABLE DISPERSION OF A POLYURETHANE WHICH COMPRISES MIXING TOGETHER A DI-(PRIMARY HYDROXY) ALCOHOL AND A DI(SECONDARY HYDROXY) ALCOHOL AND AN ORGANIC DIISOCYANATE IN AN AMOUNT UP TO THE STOICHIOMETRIC EQUIVALENT OF SAID DI(PRIMARY HYDROXY) ALCOHOL, WHEREBY SAID DI(PRIMARY HYDROXY) ALCOHOL REACTS PREFERENTIALLY WITH THE ORGANIC DIISOCYANATE TO FORM A POLYURETHANE WHICH PRECIPITATES FROM SOLUTION FORMING A DISPERSION IN SAID DI(SECONDARY HYDROXY) ALCOHOL WHICH DOES NOT SETTLE OUT UPON STANDING.
References Cited (Backward Citations)
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Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-25 | 1971-06-26 | 1971-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-25 | 1975-06-26 | 1975-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-25 | 1979-06-26 | 1979-12-26 | $7700.00 | Window Closed / Lapsed |