US2833740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Processing of polyurethane polymers prepared from polyalkyleneether glycols and product resulting therefrom
Assignee: EIDP Inc
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Filing: 1955-09-07
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Granted: 1958-05-06
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Expires: 1975-09-07
Abstract
No abstract record available.
Inventors
- 👤 Verbanc John Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:33
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C08G18/7825; C08L; C08L75/00; C08L75/04; C08L75/08; Y; Y10; Y10S; Y10S528/00; Y10S528/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
IN THE PROCESSING OF A STABLE, UNCURED POLYURETHANE POLYMER WHICH CONTAINS SUBSTANTIALLY NO FREE ISOCYANATE GROUPS, SAID POLYMER HAVING BEEN PREPARED BY THE REACTION OF POLYALKYLENEETHER GLYCOLS OF MOLECULAR WEIGHT FROM ABOUT 750 TO 10,000 ORGANIC DIISOCYANATES AND A CHAIN-EXTENDING AGENT SELECTED FROM THE GROUP CONSISTING OF WATER, HYDRAZINE, ORGANIC GLYCOLS, ORGANIC DIAMINES, ORGANIC DICARBOXY ACIDS, ORGANIC DICARBOXY AMIDES, ORGANIC DISULFONIC ACIDS AND ORGANIC DISULFONAMIDES, BY INCORPORATING THEREWITH A DIISOCYANATE CURING AGENT AND HEATING THE MIXTURE TO A TEMPERATURE OF BETWEEN ABOUT 90 AND 150*C. UNTIL A CURED ELASTOMER IS FORMED, THE STEP WHICH COMPRISES INCORPORATING THEREWITH PRIOR TO THE ADDITION OF THE CURING AGENT FROM 1 TO 10% BY WEIGHT OF A COPOLYMER OF ETHYLENE AND CARBON MONOXIDE HAVING A MOLECULAR WEIGHT IN THE RANGE OF 700 TO 1500 AND A MOLAR RATIO OF ETHYLENE TO CARBON MONOXIDE BETWEEN ABOUT 5:1 AND 12:1.
Claim 2
Dependent Claim
144 words
IN THE PROCESSING OF A STABLE, UNCURED POLYURETHANE POLYMER WHICH CONTAINS SUBSTANTIALLY NO FREE ISOCYANATE GROUPS, SAID POLYMER HAVING BEEN PREPARED BY THE REACTION OF POLYALKYLENEETHER GLYCOLS OF MOLECULAR WEIGHT FROM ABOUT 750 TO 10,000 ORGANIC DIISOCYANATES AND A CHAIN-EXTENDING AGENT SELECTED FROM THE GROUP CONSISTING OF WATER, HYDRAZINE, ORGANIC GLYCOLS, ORGANIC DIAMINES, ORGANIC DICARBOXY ACIDS, ORGANIC DICARBOXY AMIDES, ORGANIC DISULFONIC ACIDS AND ORGANIC DISULFONAMIDES, BY INCORPORATING THEREWITH A DIISOCYANATE CURING AGENT AND HEATING THE MIXTURE TO A TEMPERATURE OF BETWEEN ABOUT 90 AND 150*C. UNTIL A CURED ELASTOMER IS FORMED, THE STEP WHICH COMPRISES INCORPORATING THEREWITH PRIOR TO THE ADDITION OF THE CURING AGENT FROM 1 TO 10% BY WEIGHT OF A COPOLYMER OF ETHYLENE AND CARBON MONOXIDE HAVING A MOLECULAR WEIGHT IN THE RANGE OF 700 TO 1500 AND A MOLAR RATIO OF ETHYLENE TO CARBON MONOXIDE BETWEEN ABOUT 5:1 AND 12:1.
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) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |