Patent US3119716A successfully refreshed from Google Patents.
US3119716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Patent leather finishes
Assignee: Honeywell International Inc
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Filing: 1960-08-01
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Granted: 1964-01-28
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Expires: 1980-08-01
Abstract
No abstract record available.
Inventors
- 👤 George S Wooster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:57
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/36; C08G18/38; C08G18/3819; C08G18/3823; C08G18/3831; C14; C14C; C14C11/00; C14C11/003; C14C11/006
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
137 words
A METHOD FOR PRODUCING POLYURETGHANE POLYISOCYANATGE FILM-FORMING COMPOSITION ADPATED FOR ME AS A PATENT LEATHER FINISH WHICH COMPRISES FIRST PRODUCING A POLYURETHANE POLYOL REACTION PRODUCT BY HEATING A MIXTURE OF CASTOR OIL AND ORGANIC DIISOCYANATE IN SUCH PROPORTIONS THAT THE RATIO OF NCO GROUPS TO OH GROUPS IN THE REACTANTS IS BETWEEN 0.4 TO 0.6 UNTIL THE VISCOSITY OF THE REACTION MASS RISES TO A MAXIMUM VALUE WHICH REMAINS SUBSTANTIALLY UNCHANGED ON FURTHER HEATING, AND THEN PRODUCING THE POLYURETHANE POLYISOCYANATE FILM-FORMING COMPOSITION BY HEATING SAID POLYURETHANE POLYOL REACTION PRODUCT WITH ADDITIONAL ORGANIC DIISOCYANATE IN SUCH AMOUNT THAT THE NCO/OH RATIO OF THE POLYURETHANE POLYOL-ORGANIC DIISOCYANATE MIXTURE IS AT LEAST 2.0, UNTIL THE REACTION IS SUBSTANTIALLY COMPLETE AS DETERMINED BY MEASURING THE AMINE EQUIVALENT OF THE REACTION MASS AND DISSOLVING THE REACTION MASS IN AN INERT ORGANIC SOLVENT.
Claim 2
Independent Claim
137 words
A METHOD FOR PRODUCING POLYURETGHANE POLYISOCYANATGE FILM-FORMING COMPOSITION ADPATED FOR ME AS A PATENT LEATHER FINISH WHICH COMPRISES FIRST PRODUCING A POLYURETHANE POLYOL REACTION PRODUCT BY HEATING A MIXTURE OF CASTOR OIL AND ORGANIC DIISOCYANATE IN SUCH PROPORTIONS THAT THE RATIO OF NCO GROUPS TO OH GROUPS IN THE REACTANTS IS BETWEEN 0.4 TO 0.6 UNTIL THE VISCOSITY OF THE REACTION MASS RISES TO A MAXIMUM VALUE WHICH REMAINS SUBSTANTIALLY UNCHANGED ON FURTHER HEATING, AND THEN PRODUCING THE POLYURETHANE POLYISOCYANATE FILM-FORMING COMPOSITION BY HEATING SAID POLYURETHANE POLYOL REACTION PRODUCT WITH ADDITIONAL ORGANIC DIISOCYANATE IN SUCH AMOUNT THAT THE NCO/OH RATIO OF THE POLYURETHANE POLYOL-ORGANIC DIISOCYANATE MIXTURE IS AT LEAST 2.0, UNTIL THE REACTION IS SUBSTANTIALLY COMPLETE AS DETERMINED BY MEASURING THE AMINE EQUIVALENT OF THE REACTION MASS AND DISSOLVING THE REACTION MASS IN AN INERT ORGANIC SOLVENT.
Claim 3
Dependent Claim
64 words
A METHOD OF PRODUCING A PATENT LEATHER FINISH ON LEATHER WHICH COMPRISES APPLYING TO LEATHER A COAT OF THE COMPOSITION PRODUCED BY THE METHOD CLAIMED IN CLAIM 1 AND CONTAINING AN ACCELERATING CATALYST,CURING SAID COAT UNTIL SET, THEREAFTER APPLYING ANOTHER COAT OF THE COMPOSITION PRODUCED BY THE METHOD CLAIMED IN CLAIM 1 AND CONTAINING AN ACCELERATING CATALYST, AND CURING SAID LATTER COAT UNTIL SET.
References Cited (Backward Citations)
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US2955958A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-27 | 1967-07-29 | 1968-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-27 | 1971-07-29 | 1972-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-27 | 1975-07-29 | 1976-01-28 | $7700.00 | Window Closed / Lapsed |