US3022255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellular polyurethane plastic and method of preparing same
Assignee: Bayer AG
•
Filing: 1958-12-03
•
Granted: 1962-02-20
•
Expires: 1978-12-03
Abstract
No abstract record available.
Inventors
- 👤 Morschel Heinrich
- 👤 Loew Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:04
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4854; C08G18/50; C08G18/5003; C08G18/5006; C08G18/5009; C08G2110/00; C08G2110/0008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
A PROCESS FOR THE PRODUCTION O F IMPROVED CELLULAR POLYURETHANE PLASTIC COMPRISING REACTING AN ORGANIC POLYISOCYANATE, WATER, AND AN ORGANIC POLYHYDROXYL COMPOUND CONTAINING ETHER LINKAGES AND AT LEAST THREE HYDROXYL GROUPS COMPRISING THE POLYMERIZATION PRODUCT OF THETRAHYDROFURAN, ALKYLENE OXIDE, AND EPICHLOROHYDIRN, WHICH HAS BEEN REACTED WITH A GLYCOLATE HAVING THE FORMULA HO(CH2)NOME, WHEREIN N IS AN INTEGER OF FROM TWO TO SIX AND ME IS AN ALKALI METAL, TO PROVIDE HYDROXYL GROUPS FOR THE CHLORINE ATOMS.
Claim 2
Dependent Claim
76 words
A PROCESS FOR THE PRODUCTION O F IMPROVED CELLULAR POLYURETHANE PLASTIC COMPRISING REACTING AN ORGANIC POLYISOCYANATE, WATER, AND AN ORGANIC POLYHYDROXYL COMPOUND CONTAINING ETHER LINKAGES AND AT LEAST THREE HYDROXYL GROUPS COMPRISING THE POLYMERIZATION PRODUCT OF THETRAHYDROFURAN, ALKYLENE OXIDE, AND EPICHLOROHYDIRN, WHICH HAS BEEN REACTED WITH A GLYCOLATE HAVING THE FORMULA HO(CH2)NOME, WHEREIN N IS AN INTEGER OF FROM TWO TO SIX AND ME IS AN ALKALI METAL, TO PROVIDE HYDROXYL GROUPS FOR THE CHLORINE ATOMS.
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) | 1965-02-19 | 1965-08-21 | 1966-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-19 | 1969-08-21 | 1970-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-19 | 1973-08-21 | 1974-02-20 | $7700.00 | Window Closed / Lapsed |