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Patent US3741935A successfully refreshed from Google Patents.
US3741935A
Expired / Lapsed
US
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High solids thermosetting beta keto ester coating compositions
Assignee: PPG Industries Inc
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Filing: 1971-03-04
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Granted: 1973-06-26
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Expires: 1991-03-04
Abstract
Abstract HIGH SOLIDS, THERMOSETTING COATING COMPOSITIONS ARE PRODUCED FROM A REACTION PRODUCT HAVING A PLURALITY OF BETA-KETO ESTER GROUPS AND CONDENSATION PRODUCTS OF FORMALDEHYDE WITH MELAMINE, UREA OR BENZOGUANAMINE. REACTIVE COPOLYMERS MAY ALSO BE ADMIXED WITH THE ABOVE COMPOSITIONS FOR CO-CURING.
Inventors
- 👤 R Dowbenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:18
CPC Classifications
C; C09; C09D; C09D161/00; C09D161/20
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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |