US3060137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of cellular polyurethane plastics
Assignee: Bayer Corp
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Filing: 1960-05-03
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Granted: 1962-10-23
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Expires: 1980-05-03
Abstract
No abstract record available.
Inventors
- 👤 Paul G Gemeinhardt
- 👤 Robert L Sandridge
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:13
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/36; C08L; C08L75/00; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S521/00; Y10S521/918
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN THE PREPARATION OF A CELLULAR POLYURETHANE PLASTIC BY A PROCESS WHICH COMPRISES REACTING AN ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF HYDROXYL POLYESTERS PREPARED BY THE PROCESS WHICH COMPRISES REACTING A POLYHYDRIC ALCOHOL WITH A POLYCARBOXYLIC ACID AND POLYHYDRIC POLYALKYLENE ETHERS, SAID ORGANIC COMPOUND HAVING A MOLECULAR WEIGHT OF AT LEAST 700, WATER AND AN ORGANIC POLYISOCYANATE, THE IMPROVEMENT WHICH COMPRISES EFFECTING THE REACTION WITH A MIXTURE COMPRISING A TERTIARY AMINE CATALYST, THE STANNOUS SALT OF A CARBOXYLIC ACID HAVING FROM ABOUT 1 TO ABOUT 20 CARBON ATOMS, AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF CATECHOL, RESORCINOL, SUBSTITUTED CATECHOLS AND SUBSTITUTED RESORCINOLS,, -NCO AND HYDROXYL GROUPS,AND CRUSHING THE RESULTING CELLULAR PRODUCT SHORTLY THEREAFTER TO RUPTURE SUBSTANTIALLY ALL THE CELLS.
Claim 2
Dependent Claim
123 words
IN THE PREPARATION OF A CELLULAR POLYURETHANE PLASTIC BY A PROCESS WHICH COMPRISES REACTING AN ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF HYDROXYL POLYESTERS PREPARED BY THE PROCESS WHICH COMPRISES REACTING A POLYHYDRIC ALCOHOL WITH A POLYCARBOXYLIC ACID AND POLYHYDRIC POLYALKYLENE ETHERS, SAID ORGANIC COMPOUND HAVING A MOLECULAR WEIGHT OF AT LEAST 700, WATER AND AN ORGANIC POLYISOCYANATE, THE IMPROVEMENT WHICH COMPRISES EFFECTING THE REACTION WITH A MIXTURE COMPRISING A TERTIARY AMINE CATALYST, THE STANNOUS SALT OF A CARBOXYLIC ACID HAVING FROM ABOUT 1 TO ABOUT 20 CARBON ATOMS, AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF CATECHOL, RESORCINOL, SUBSTITUTED CATECHOLS AND SUBSTITUTED RESORCINOLS,, -NCO AND HYDROXYL GROUPS,AND CRUSHING THE RESULTING CELLULAR PRODUCT SHORTLY THEREAFTER TO RUPTURE SUBSTANTIALLY ALL THE CELLS.
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) | 1965-10-22 | 1966-04-23 | 1966-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-22 | 1970-04-23 | 1970-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-22 | 1974-04-23 | 1974-10-23 | $7700.00 | Window Closed / Lapsed |