Patent US2136450A successfully refreshed from Google Patents.
Patent US3234153A successfully refreshed from Google Patents.
US3234153A
Expired / Lapsed
US
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Preparation of a cellular polyurethane plastic
Assignee: Bayer Corp
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Filing: 1964-09-08
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Granted: 1966-02-08
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Expires: 1984-09-08
Abstract
No abstract record available.
Inventors
- 👤 J W Britain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:43
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/20; C08G18/2009; C08G18/2018
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
188 words
IN THE PREPARATION OF A CELLULAR POLYURETHANE PLASTIC BY A PROCESS WHICH COMPRISES REACTING A COMPOUND HAVING THE FORMULA R(NCX)N, WHEREIN R IS A DIVALENT ORGANIC RADICAL, X IS A CHALKOGEN HAVING A MOLECULAR WEIGHT OF LESS THAN 33, AND N IS AN INTEGER OF AT LEAST 2, WATER AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF A POLYESTER PREPARED BY ESTERIFICATION OF A DIACARBOXYLIC ACID AND A POLYHYDRIC ALCOHOL, A POLYALKYLENE ETHER GLYCOL, A POLYALKYLENE THIOETHR GLYCOL AND A POLYACETAL PREPARED BY CONDENSING AN ALDEHYDE WITH AN ALKYLENE OXIDE, SAID GROUP MEMBER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 500 AND AN HYDROXYL NUMBER OF NOT MORE THAN ABOUT 225, SAID POLYESTER HAVING AN ACID NUMBER OF FROM ABOUT 0 TO ABOUT 2, SAID R(NCX)N COMPOUND BEING PRESENT IN AN AMOUNT IN EXCESS OVER THAT REQUIRED TO REACT WITH ALL THE REACTIVE HYDROGEN OF SAID GROUP MEMBER, THE IMPROVEMENT WHICH COMPRISES EFFECTING AT LEAST THE REACTION WITH THE WATER IN THE PRESENCE OF A CATALYTIC AMOUNT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF N-N-BIS(3-DIMETHYL AMINO PROPYL) ACETAMIDE AND A COMPOUND HAVING THE FORMULA
Claim 2
Dependent Claim
188 words
IN THE PREPARATION OF A CELLULAR POLYURETHANE PLASTIC BY A PROCESS WHICH COMPRISES REACTING A COMPOUND HAVING THE FORMULA R(NCX)N, WHEREIN R IS A DIVALENT ORGANIC RADICAL, X IS A CHALKOGEN HAVING A MOLECULAR WEIGHT OF LESS THAN 33, AND N IS AN INTEGER OF AT LEAST 2, WATER AND A MEMBER SELECTED FROM THE GROUP CONSISTING OF A POLYESTER PREPARED BY ESTERIFICATION OF A DIACARBOXYLIC ACID AND A POLYHYDRIC ALCOHOL, A POLYALKYLENE ETHER GLYCOL, A POLYALKYLENE THIOETHR GLYCOL AND A POLYACETAL PREPARED BY CONDENSING AN ALDEHYDE WITH AN ALKYLENE OXIDE, SAID GROUP MEMBER HAVING A MOLECULAR WEIGHT OF AT LEAST ABOUT 500 AND AN HYDROXYL NUMBER OF NOT MORE THAN ABOUT 225, SAID POLYESTER HAVING AN ACID NUMBER OF FROM ABOUT 0 TO ABOUT 2, SAID R(NCX)N COMPOUND BEING PRESENT IN AN AMOUNT IN EXCESS OVER THAT REQUIRED TO REACT WITH ALL THE REACTIVE HYDROGEN OF SAID GROUP MEMBER, THE IMPROVEMENT WHICH COMPRISES EFFECTING AT LEAST THE REACTION WITH THE WATER IN THE PRESENCE OF A CATALYTIC AMOUNT OF A MEMBER SELECTED FROM THE GROUP CONSISTING OF N-N-BIS(3-DIMETHYL AMINO PROPYL) ACETAMIDE AND A COMPOUND HAVING THE FORMULA
References Cited (Backward Citations)
US3019200A
Cited
US3073787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-07 | 1969-08-09 | 1970-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-07 | 1973-08-09 | 1974-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-07 | 1977-08-09 | 1978-02-08 | $7700.00 | Window Closed / Lapsed |