US3076770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of polyurethane foam
Assignee: Bayer Corp
•
Filing: 1958-09-08
•
Granted: 1963-02-05
•
Expires: 1978-09-08
Abstract
No abstract record available.
Inventors
- 👤 James H Saunders
- 👤 John F Szabat
- 👤 Andrew S Morecroft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:24
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3203; C08G18/3206; C08G18/70; C08G18/72; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8009
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
THE PROCESS WHICH COMPRISES REACTING WATER AND AN -NCO TERMINATED REACTION PRODUCT OF A POLHYDRIC ALCOHOL HAVING AT LEAST THREE HYDROXYL GROUP AND A MOLECULAR WEIGHT OF LESS THAN ABOUT 150 WITH AN ORGANIC POLYISOCYANATE WHILE SAID REACTION PRODUCT IS DISSOLVED IN AN ORGANIC SOLVENT THEREOF, SAID REACTION BEING EFFECTED AT A TEMPERATURE AT WHICH SAID SOVENT HAS A VAPOR PRESSURE WHEREBY A MAJOR AMOUNT OF SAID SOLVENT VOLATILIZES AND UNDER REACTION CONDITIONNS SUCH THAT GAS BECOMES ENTRAPPED IN THE REACTION MIXTURE AND A SOLIDIFIED CELLULAR POLYURETHANE IS FORMED.
Claim 2
Dependent Claim
89 words
THE PROCESS WHICH COMPRISES REACTING WATER AND AN -NCO TERMINATED REACTION PRODUCT OF A POLHYDRIC ALCOHOL HAVING AT LEAST THREE HYDROXYL GROUP AND A MOLECULAR WEIGHT OF LESS THAN ABOUT 150 WITH AN ORGANIC POLYISOCYANATE WHILE SAID REACTION PRODUCT IS DISSOLVED IN AN ORGANIC SOLVENT THEREOF, SAID REACTION BEING EFFECTED AT A TEMPERATURE AT WHICH SAID SOVENT HAS A VAPOR PRESSURE WHEREBY A MAJOR AMOUNT OF SAID SOLVENT VOLATILIZES AND UNDER REACTION CONDITIONNS SUCH THAT GAS BECOMES ENTRAPPED IN THE REACTION MIXTURE AND A SOLIDIFIED CELLULAR POLYURETHANE IS FORMED.
References Cited (Backward Citations)
DE870400C
Cited
US2577281A
Cited
US2764565A
Cited
US2855421A
Cited
US2936293A
Cited
US2866774A
Cited
US2867278A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |