Patent US2987491A successfully refreshed from Google Patents.
US2987491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkyd resins modified by beta amino crotonic esters of higher organic hydroxides
Assignee: PPG Industries Inc
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Filing: 1956-08-07
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Granted: 1961-06-06
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Expires: 1976-08-07
Abstract
No abstract record available.
Inventors
- 👤 Alfred R Bader
- 👤 Henry A Vogel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:31
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/68; C08G63/685; C08G63/6854
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
18 words
A BETA-AMINO CROTONATE OF A HYDROXYL-CONTAINING ALKYD RESIN WHICH IS A PHTHALIC GLYCERIDE MODIFIED BY A GLYCERIDE OIL.
References Cited (Backward Citations)
USRE23398E
Cited
US1680799A
Cited
US2418908A
Cited
US2403619A
Cited
US2514549A
Cited
DE804442C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-05 | 1964-12-05 | 1965-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-05 | 1968-12-05 | 1969-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-05 | 1972-12-05 | 1973-06-06 | $7700.00 | Window Closed / Lapsed |