Patent US3264268A successfully refreshed from Google Patents.
US3264268A
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Polyurethanes from hydroxy alkylated aromatic amines
Assignee: Bayer AG
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Filing: 1962-06-21
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Granted: 1966-08-02
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Expires: 1982-06-21
Abstract
No abstract record available.
Inventors
- 👤 Muller Erwin
- 👤 Bayer Otto
- 👤 Peter Julius
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:43
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/84; C08G18/28; C08G18/30; C08G18/32; C08G18/3271; C08G18/329; C08G18/65; C08G18/6505; C08G18/6523; C08G18/6535; C08G18/87; Y; Y10; Y10S; Y10S528/00; Y10S528/906
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
54 words
NON-POROUS ELASTOMERIC POLYURETHANES PREPARED BY THE PROCESS WHICH COMPRISES PREPARING AN ISOCYANATE MODIFIED ACTIVE HYDROGEN TERMINATED INTERMEDIATE BY REACTING AN ORGANIC COMPOUND CONTAINING ACTIVE HYDROGEN ATOMS WHICH ARE REACTIVE WITH --NCO GROUPS AND HAVING A MOLECULAR WEIGHT OF AT LEAST 800 WITH AN ORGANIC POLYISOCYANATE AND AN HYDROXY ALKYLATED AROMATIC AMINE HAVING THE FORMULA
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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) | 1969-08-01 | 1970-01-31 | 1970-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-08-01 | 1974-01-31 | 1974-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-08-01 | 1978-01-31 | 1978-08-02 | $7700.00 | Window Closed / Lapsed |