Patent US2702797A successfully refreshed from Google Patents.
US2702797A
Expired / Lapsed
US
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Process for stabilizing a polyurethane
Assignee: EIDP Inc
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Filing: 1953-04-10
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Granted: 1955-02-22
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Expires: 1973-04-10
Abstract
No abstract record available.
Inventors
- 👤 John S Rugg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:18
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/4854; C08G18/08; C08G18/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
A PROCESS FOR IMPROVING THE SCORCHING PROPERTIES OF ELASTOMERS COMPRISING POLYETRAMETHYLENE ETHER GYLCOLTOLUENE DIISOCYANATE POLYMERS IN WHICH THE POLYMER CHAIN HAS BEEN EXTENDED BY REACTION WITH WATER AND WHICH HAVE BEEN STABILIZED BY THE ADDITION OF A NITROGEN BASE HAVING AT LEAST ONE HYDROGEN ATTACHED TO NITROGEN, WHICH COMPRISES MILLING THE STABILIZED POLYMER PRIOR TO THE ADDITION OF A CURING AGENT FOR FROM 10 TO 60 MINUTES AT TEMPERATURES OF FROM ABOUT 300* F. TO ABOUT 360* F.
Claim 2
Dependent Claim
78 words
A PROCESS FOR IMPROVING THE SCORCHING PROPERTIES OF ELASTOMERS COMPRISING POLYETRAMETHYLENE ETHER GYLCOLTOLUENE DIISOCYANATE POLYMERS IN WHICH THE POLYMER CHAIN HAS BEEN EXTENDED BY REACTION WITH WATER AND WHICH HAVE BEEN STABILIZED BY THE ADDITION OF A NITROGEN BASE HAVING AT LEAST ONE HYDROGEN ATTACHED TO NITROGEN, WHICH COMPRISES MILLING THE STABILIZED POLYMER PRIOR TO THE ADDITION OF A CURING AGENT FOR FROM 10 TO 60 MINUTES AT TEMPERATURES OF FROM ABOUT 300* F. TO ABOUT 360* F.
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) | 1958-02-21 | 1958-08-23 | 1959-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-21 | 1962-08-23 | 1963-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-21 | 1966-08-23 | 1967-02-22 | $7700.00 | Window Closed / Lapsed |