US3817918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terpolymer of a polyisocyanate a polyhydroxyphenol and an epoxy resin
Assignee: EIDP Inc
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Filing: 1972-03-31
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Granted: 1974-06-18
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Expires: 1992-03-31
Abstract
Abstract ELASTOMER-POLYESTER COMPOSITES ARE MADE WITH A TWOCOAT ADHESIVE SYSTEM WHEREIN THE SUBCOAT, APPLIED TO THE POLYESTER AS AN AQUEOUS DISPERSION AND CURED AT 204244*C, IS A TERPOLYMER OF A POLYISOCYANATE, A POLYHYDROXYPHENOL, AND AN EPOXY RESIN HAVING HIGH HYDROXYL GROUP CONTENT, THE RELATIVE EQUIVALENT PROPORTIONS OF THE MONOMERS BEING ABOUT 1:(0.4-):(0.05-0.70). THIS SUBCOAT GIVES COMPOSITES HAVING THE SAME DESIRABLE PERFORMANCE CHARACTERISTICS AS THE BEST PRIOR ART ADHESIVE BUT DOES NOT PRESENT THE PRIOR ART SYSTEM''S POLLUTION HAZARDS.
Inventors
- 👤 C Aufdermarsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:52
CPC Classifications
C; C09; C09J; C09J163/00; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/58; C08G18/65; C08G18/6505; C08G18/6511; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4028; C08G59/62; C08G59/621; C09J175/00; C09J175/04; Y; Y10; Y10S; Y10S528/00; Y10S528/905
Claims Analysis
Total Claims: 0
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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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |