US2941967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of polyurethane foam using catalysts containing aliphatically bound ether oxygen atom and a tertiary amino group
Assignee: Bayer AG
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Filing: 1957-07-18
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Granted: 1960-06-21
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Expires: 1977-07-18
Abstract
No abstract record available.
Inventors
- 👤 Moller Friedrich
- 👤 Muller Erwin
- 👤 Hoppe Peter
- 👤 Braun Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:53
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/1833
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
85 words
IN A PROCESS WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE, WATER AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF A POLYESTER PREPARED BY ESTERIFICATION OF A POLYHYDRIC ALCOHOL AND A POLYCARBOXYLIC ACID, A POLYALKYLENE ETHER GLYCOL, A POLYTHIOETHER GLYCOL, AND A POLYACETAL, SAID GROUP MEMBER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 500, TO FORM A POLYURETHANE FOAM, THE IMPROVEMENT WHICH COMPRISES INCLUDING IN THE REACTION MIXTURE A CATALYTIC AMOUNT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
85 words
IN A PROCESS WHICH COMPRISES REACTING AN ORGANIC POLYISOCYANATE, WATER AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF A POLYESTER PREPARED BY ESTERIFICATION OF A POLYHYDRIC ALCOHOL AND A POLYCARBOXYLIC ACID, A POLYALKYLENE ETHER GLYCOL, A POLYTHIOETHER GLYCOL, AND A POLYACETAL, SAID GROUP MEMBER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 500, TO FORM A POLYURETHANE FOAM, THE IMPROVEMENT WHICH COMPRISES INCLUDING IN THE REACTION MIXTURE A CATALYTIC AMOUNT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF A COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |