US2692874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomers from polyalkylene ether glycol reacted with arylene diisocyanate and water
Assignee: EIDP Inc
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Filing: 1952-05-17
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Granted: 1954-10-26
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Expires: 1972-05-17
Abstract
No abstract record available.
Inventors
- 👤 Esley O Langerak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 02:53
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/02; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/089; C08G18/10; C08G18/16; C08G18/166; C08G18/168; C08G18/18; C08G18/1875; C08G18/28; C08G18/30; C08G18/302; C08G18/40; C08G18/48; C08G18/4825; C08G18/4833; C08G2110/00; C08G2110/0008; C08G2110/0083; C08J2375/00; C08J2375/04; C08J2375/08; Y; Y10; Y10S; Y10S528/00; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN A PROCESS FOR THE PREPARATION OF ELASTOMERIC CONDENSATION PRODUCTS BY THE REACTION OF A POLYALKYLENE ETHER GLYCOL HAVING A MOLECULAR WEIGHT BETWEEN 750 AND 10,000 WITH AN ARYLENE DIISOCYANATE IN THE PRESENCE OF A SMALL AMOUNT OF WATER UNDER ACID CONDITIONS, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE CONDENSATION IN THE PRESENCE OF FROM 0.04 TO 1% BY WEIGHT, BASED ON THE WEIGHT OF THE ENTIRE REACTION MIXTURE, OF A TERTIARY ORGANIC BASE FROM THE CLASS CONSISTING OF TERTIARY NITROGEN AND TERTIARY PHOSPHOROUS BASES BEING PRESENT IN THE FORM OF AN ACID SALT.
Claim 2
Dependent Claim
94 words
IN A PROCESS FOR THE PREPARATION OF ELASTOMERIC CONDENSATION PRODUCTS BY THE REACTION OF A POLYALKYLENE ETHER GLYCOL HAVING A MOLECULAR WEIGHT BETWEEN 750 AND 10,000 WITH AN ARYLENE DIISOCYANATE IN THE PRESENCE OF A SMALL AMOUNT OF WATER UNDER ACID CONDITIONS, THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE CONDENSATION IN THE PRESENCE OF FROM 0.04 TO 1% BY WEIGHT, BASED ON THE WEIGHT OF THE ENTIRE REACTION MIXTURE, OF A TERTIARY ORGANIC BASE FROM THE CLASS CONSISTING OF TERTIARY NITROGEN AND TERTIARY PHOSPHOROUS BASES BEING PRESENT IN THE FORM OF AN ACID SALT.
References Cited (Backward Citations)
US2531392A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-25 | 1958-04-26 | 1958-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-25 | 1962-04-26 | 1962-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-25 | 1966-04-26 | 1966-10-26 | $7700.00 | Window Closed / Lapsed |