Patent US3109825A successfully refreshed from Google Patents.
US3109825A
Expired / Lapsed
US
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Manufacture of polyurethane materials
Assignee: Imperial Chemical Industries Ltd
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Filing: 1960-02-11
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Granted: 1963-11-05
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Expires: 1980-02-11
Abstract
No abstract record available.
Inventors
- 👤 O'mant Derrick Michael
- 👤 Twitchett Harry James
- 👤 Wild James Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:57
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/18; C08G18/20; C08G18/2009; C08G18/2018; C08L; C08L75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
IN A PROCESS FOR THE MANUFACTURE OF POLYURETHANE MATERIALS BY THE INTERACTION OF AN ORGANIC POLYISOCYANATE AND AN ISOCYANTE-REACTIVE HYDROXYL-CONTAINING MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYESTERS AND POLYETHERS; THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE INTERACTION IN THE PRESENCE OF, A CATALYST, A FULLY N-SUBSTITUTED-4-AMINO-PYRIDINE WHEREIN N-SUBSTITUENTS ARE SELECTED FROM THE GROUP CONSISTING OF HYDROCARBON RADICALS, HETEROCYCLIC RADICALS CONTAINING ONE HETERO ATOM SELECTED FROM THE GROUP CONSISTING OF NITROGEN AND OXYGEN IN A CARBON CHAIN, AND HYDROCARBON RADICALS SUBSTITUTED WITH ALKYLAMINO AND DIALKYLAMINO GROUPS.
Claim 2
Dependent Claim
86 words
IN A PROCESS FOR THE MANUFACTURE OF POLYURETHANE MATERIALS BY THE INTERACTION OF AN ORGANIC POLYISOCYANATE AND AN ISOCYANTE-REACTIVE HYDROXYL-CONTAINING MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYESTERS AND POLYETHERS; THE IMPROVEMENT WHICH COMPRISES CARRYING OUT THE INTERACTION IN THE PRESENCE OF, A CATALYST, A FULLY N-SUBSTITUTED-4-AMINO-PYRIDINE WHEREIN N-SUBSTITUENTS ARE SELECTED FROM THE GROUP CONSISTING OF HYDROCARBON RADICALS, HETEROCYCLIC RADICALS CONTAINING ONE HETERO ATOM SELECTED FROM THE GROUP CONSISTING OF NITROGEN AND OXYGEN IN A CARBON CHAIN, AND HYDROCARBON RADICALS SUBSTITUTED WITH ALKYLAMINO AND DIALKYLAMINO GROUPS.
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) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |