US3647923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin compositions containing hindered phenols
Assignee: Gulf Research and Development Co
•
Filing: 1968-07-15
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Granted: 1972-03-07
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Expires: 1988-07-15
Abstract
Abstract THE SHELF LIFE OF A LIQUID CURABLE RESIN SYSTEM IS INCREASED BY THE ADDITION OF A HINDERED PHENOL, SUCH AS 2,6DITERTIARYBUYLPHENOL OR 2,6-DITERTIARYBURTYL-P-CRESOL. THE LIQUID CURABLE RESIN SYSTEM COMPRISES A COPOLYMER OF MALEIC ANHYDRIDE AND AN ALPHA-OLEFIN SUCH AS HEXENE-1; A LIQUID UNSATURATED MONOEPOXIDE SUCH AS GLYCIDYL ACRYLATE OR GLYCIDYL METHACRYALTE; AND STYRENE. THE SYSTEM PREFERABLY CONTAINS LESS THAN 10 P.P.M. OF WATER.
Inventors
- 👤 Stanley M Hazen
- 👤 William J Heilman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:44
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13
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) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |