US3891602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy scale-resistant coating
Assignee: Texaco Inc
•
Filing: 1973-09-24
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Granted: 1975-06-24
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Expires: 1993-09-24
Abstract
Abstract Novel epoxy resins modified with polyisocyanates and pendant polyether chains provide an excellent scale-resistant surface when applied as a coating and exposed to mineralized water prone to deposit scale on surfaces.
Inventors
- 👤 James W Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:39
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/2815; C08G18/283; C08G18/40; C08G18/58; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4028; C09; C09D; C09D163/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
26 words
A NOVEL SCALE-RESIISTANT MODIFIIED EPOXY RESIN MADE BY THE CURING REACTION OF AN EPOXY RESIN PREPARED BY COMBININD EPICHLOROHYDRIN AND P,P''-ISOPROPYLIDENE DIPHENOL HAVING THE STRUCTURAL FORMULA:
Claim 2
Dependent Claim
26 words
A NOVEL SCALE-RESIISTANT MODIFIIED EPOXY RESIN MADE BY THE CURING REACTION OF AN EPOXY RESIN PREPARED BY COMBININD EPICHLOROHYDRIN AND P,P''-ISOPROPYLIDENE DIPHENOL HAVING THE STRUCTURAL FORMULA:
Claim 3
Dependent Claim
21 words
A modified epoxy resin as in claim 1 wherein the resin is in the form of a coating on a substrate.
Claim 4
Dependent Claim
16 words
A resin as in claim 1 wherein the blocked isocyanate is toluene diisocyanate reacted with phenol.
Claim 5
Dependent Claim
32 words
A modified epoxy resin as in claim 1 wherein a catalyst is added to accelerate the reaction between the isocyanate groups and the monohydric polyether and epoxide groups of the epoxy resin.
References Cited (Backward Citations)
US3321549A
Cited
US3660523A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |