Patent US3092592A successfully refreshed from Google Patents.
US3092592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of cellular polyurethane plastics
Assignee: Bayer AG
•
Filing: 1957-07-09
•
Granted: 1963-06-04
•
Expires: 1977-07-09
Abstract
No abstract record available.
Inventors
- 👤 Nischk Gunther
- 👤 Hoppe Peter
- 👤 Braun Gunther
- 👤 Paffrath Hans-Willi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:52
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/60; C08G18/606; C08G18/42; C08G18/4288; C08G2110/00; C08G2110/0025; C08G2110/0041; C08G2110/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN THE MANUFACTURE OF CELLULAR POLYURETHANE PLASTICS BY A PROCESS WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE WITH WATER AND AN HYDROXYL POLYESTER THE IMPROVEMENT WHICH COMPRISES REACTING AN EXCESS OF AN ORGANIC POLYISOCYANATE BASED ON THE HYDROXYL GROUPS OF SAIF POLYESTER WITH WATER AND A POLYESSTER HAVING TERMINAL DYDROXYL GROUPS, AN HYDROXYL NUMBER OF AT LEAST ABOUT 250, AN ACID NUMBER LESS THAN TWO AND PREPARED BY CONDENSING A POLYHYDRIC ALCOHOL COMPRISING AT LEAST ABOUT 50 PERCENT OF A POLYHYDRIC ALCOHOL CONTAINING AT LEAST THREE HYDROXYL GROUPS, WITH A MIXTURE OF CARBOXYLIC ACIDS COMPRISING OLECI ACID, AN AROMATIC DICAROXYLIC ACID AND A SATURATE ALIPHATIC POLYCARBOXYLIC ACID, THE MOLAR RATIO OF SAID AROMATIC DICARBOXYLIC ACID TO SAD SATURATED ALIPHASTIC POLYCARBOXYLIC ACID BEING WITHIN THE RANGE OF FROM ABOUT 1:0.3 TO ABOUT 1:2.
Claim 2
Dependent Claim
131 words
IN THE MANUFACTURE OF CELLULAR POLYURETHANE PLASTICS BY A PROCESS WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE WITH WATER AND AN HYDROXYL POLYESTER THE IMPROVEMENT WHICH COMPRISES REACTING AN EXCESS OF AN ORGANIC POLYISOCYANATE BASED ON THE HYDROXYL GROUPS OF SAIF POLYESTER WITH WATER AND A POLYESSTER HAVING TERMINAL DYDROXYL GROUPS, AN HYDROXYL NUMBER OF AT LEAST ABOUT 250, AN ACID NUMBER LESS THAN TWO AND PREPARED BY CONDENSING A POLYHYDRIC ALCOHOL COMPRISING AT LEAST ABOUT 50 PERCENT OF A POLYHYDRIC ALCOHOL CONTAINING AT LEAST THREE HYDROXYL GROUPS, WITH A MIXTURE OF CARBOXYLIC ACIDS COMPRISING OLECI ACID, AN AROMATIC DICAROXYLIC ACID AND A SATURATE ALIPHATIC POLYCARBOXYLIC ACID, THE MOLAR RATIO OF SAID AROMATIC DICARBOXYLIC ACID TO SAD SATURATED ALIPHASTIC POLYCARBOXYLIC ACID BEING WITHIN THE RANGE OF FROM ABOUT 1:0.3 TO ABOUT 1:2.
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) | 1966-06-03 | 1966-12-03 | 1967-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-03 | 1970-12-03 | 1971-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-03 | 1974-12-03 | 1975-06-04 | $7700.00 | Window Closed / Lapsed |