Patent US3748294A successfully refreshed from Google Patents.
US3748294A
Expired / Lapsed
US
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Liquid compositions comprising gelled urethane polymer
Assignee: Dulux Australia Ltd
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Filing: 1971-08-02
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Granted: 1973-07-24
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Expires: 1991-08-02
Abstract
Abstract A PROCESS IS DISPERSED WHEREBY LIQUID, SELF-STABILIZED GELS OF URETHANE POLYMER FREE OF VISIBLE GEL PARTICLES, IN AN INERT ORGANIC LIQUID ARE PREPARED FROM POLYISOCYANATE AND POLYHYDROXY REACTANTS WHICH WOULD OTHERWISE COREACT TO FORM VISIBLE GELS. THE LIQUIDS ARE USEFUL PER SE FOR THE MANUFACTURE OF SURFACE COATINGS AND BLENDS THEREOF WITH CONVENTIONAL COATINGS COMPOSITIONS, ESPECIALLY OF THE AIR-DRYING ALKYD RESIN TYPE, ENHANCE THROUGH-DRYING RATES AND RETARD WRINKLING.
Inventors
- 👤 R Kershaw
- 👤 L Polgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:39
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/4288; C08G18/08; C08G18/0838; C08G18/0842; C08G18/0861; C08G18/0871; C08G18/30; C08G18/36; C09; C09D; C09D167/00; C09D167/08; C08G2220/00
Claims Analysis
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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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |