US3357932A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes prepared from chlorocarbonic acid ester reaction products with nu-alkylalkanolamines
Assignee: Bayer AG
•
Filing: 1964-06-03
•
Granted: 1967-12-12
•
Expires: 1984-06-03
Abstract
No abstract record available.
Inventors
- 👤 Heydkamp Wolfgang
- 👤 Muller Erwin
- 👤 Kallert Wilhelm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:58
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/48; E01C19/4806; E01C19/4826; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/64; C08G18/6415; C08L; C08L75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A POLYURETHANE PLASTIC PREPARED BY THE PROCESS WHICH COMPRISES REACTING (A) AN ORGANIC POLYISOCYANATE WITH (B) AN ORGANIC POLYHYDROXY COMPOUND HAVING A MOLECULAR WEIGHT OF FROM ABOUT 500 TO ABOUT 4000, SAID ORGANIC POLYHYDROXY COMPOUND HAVING BEEN PREPARED BY REACTING (C) A POLYFUNCTIONAL CHLOROCARBONIC ACID ESTER OF A POLYALKYLENE ETHER GLYCOL WITH (D) ESSENTIALLY 1 MOL OF AN NALKYLALKANOLAMINE PER CHLOROCARBONIC ACID ESTER GROUP.
Claim 2
Dependent Claim
64 words
A POLYURETHANE PLASTIC PREPARED BY THE PROCESS WHICH COMPRISES REACTING (A) AN ORGANIC POLYISOCYANATE WITH (B) AN ORGANIC POLYHYDROXY COMPOUND HAVING A MOLECULAR WEIGHT OF FROM ABOUT 500 TO ABOUT 4000, SAID ORGANIC POLYHYDROXY COMPOUND HAVING BEEN PREPARED BY REACTING (C) A POLYFUNCTIONAL CHLOROCARBONIC ACID ESTER OF A POLYALKYLENE ETHER GLYCOL WITH (D) ESSENTIALLY 1 MOL OF AN NALKYLALKANOLAMINE PER CHLOROCARBONIC ACID ESTER GROUP.
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) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |