US3699061A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coating composition containing urethan-modified epoxidized ester and polycarboxylic acid material
Assignee: Sherwin Williams Co
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Filing: 1971-02-22
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Granted: 1972-10-17
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Expires: 1991-02-22
Abstract
Abstract A RESIN SUITABLE FOR MAKING A TWO-PACKAGE COATING SYSTEM INCLUDES A COMPONENT VEHICLE COMPRISING AN EPOXIDIZED FATTY ACID ESTER PARTIALLY REACTED WITH A MONOCARBOXYLIC ALCOHOL AND FURTHER REACTED WITH A POLYISOCYANATE TO FORM A PREPOLYMER MATERIAL. IN A TWO-PACKAGE COATING SYSTEM, A POLYCARBOXYLIC CURING AGENT IS ADMIXED WITH THE URETHAN-MODIFIED EPOXIDIZED ESTER FOR CURING THE RESIN BY REACTION OF THE CARBOXYL GROUPS WITH RESIDUAL OXIRANE GROUPS. HARD TACK-FREE FILMS ARE ACHIEVED WITHIN A SHORT PERIOD AT AMBIENT TEMPERATURE. THIS RESIN IS ESPECIALLY ADAPTED FOR MAKING PROTECTIVE AND DECORATIVE COATINGS, EITHER CLEAR OR PIGMENTED.
Inventors
- 👤 Arthur L Cunningham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:53
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08G18/2815; C08G18/2845; C08G18/30; C08G18/36; C08G18/40; C08G18/58; C08G18/581; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4028; C08G59/62; C08G59/625
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |