Patent US1732899A successfully refreshed from Google Patents.
US2850474A
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Process of curing polyurethanes using a polyisocyanate and a methylol melamine
Assignee: Goodyear Tire and Rubber Co
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Filing: 1955-02-01
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Granted: 1958-09-02
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Expires: 1975-02-01
Abstract
No abstract record available.
Inventors
- 👤 Frank S Maxey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:35
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/83; C08G18/833; C08G18/08; C08G18/10; C08L; C08L75/00; C08L75/04; C08L75/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN THE METHOD OF CURING ELASTOMERIC ORGANIC DIISOCYANATE MODIFIED POLYESTERS BY MEANS OF AN ORGANIC POLYISOCYANATE, SAID POLYESTERS BEING PREPARED FROM THE CONDENSATION REACTION BETWEEN A DICARBOXYLIC ACID AND A GLYCOL, THE IMPROVEMENT WHICH COMPRISES COMDUCTING SAID CURE IN THE PRESENCE OF FROM 0.5 TO 5 PARTS BY WEIGHT OF AN ALKYL ETHER OF METHYLOL MELAMINE PER 100 PARTS BY POLYESTER, THE ALKYL RADICAL CONTAINING FROM 1 TO 5 CARBON WEIGHT OF SAID ELASTOMERIC ORGANIC DIISOCYANATE MODIFIED ATOMS.
Claim 2
Dependent Claim
78 words
IN THE METHOD OF CURING ELASTOMERIC ORGANIC DIISOCYANATE MODIFIED POLYESTERS BY MEANS OF AN ORGANIC POLYISOCYANATE, SAID POLYESTERS BEING PREPARED FROM THE CONDENSATION REACTION BETWEEN A DICARBOXYLIC ACID AND A GLYCOL, THE IMPROVEMENT WHICH COMPRISES COMDUCTING SAID CURE IN THE PRESENCE OF FROM 0.5 TO 5 PARTS BY WEIGHT OF AN ALKYL ETHER OF METHYLOL MELAMINE PER 100 PARTS BY POLYESTER, THE ALKYL RADICAL CONTAINING FROM 1 TO 5 CARBON WEIGHT OF SAID ELASTOMERIC ORGANIC DIISOCYANATE MODIFIED ATOMS.
References Cited (Backward Citations)
US2432148A
Cited
US2625535A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |