US2948705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resinous composition
Assignee: EIDP Inc
•
Filing: 1956-02-10
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Granted: 1960-08-09
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Expires: 1976-02-10
Abstract
No abstract record available.
Inventors
- 👤 Robinson Charles Franklin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:15
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
COMPOSITION OF MATTER COMPRISING AN EPOXY RESIN SELECTED FROM THE GROUP CONSISTING OF GLYCIDYL POLYETHERS OF POLYHYDRIC ALCOHOLS AND GLYCIDYL POLYETHERS OF POLYHYDRIC PHENOLS AND HAVING A 1,2-EPOXIDE EQUIVALENCY GREATER THAN ONE AND A MIXTURE OF PYROMELLITIC DIANHYDRIDE AND MALEIC ANHYDRIDE IN WHICH FROM 25 TO 65% OF THE ANHYDRIDE GROUPS OF THE ANHYDRIDE MIXTURE ARE CONTRIBUTED BY THE PYROMELLITIC DIANHYDRIDE, THE AMOUNT OF THE ANHYDRIDE MIXTURE BEING THAT WHICH PROVIDES 0.7 TO 0.9 ANHYDRIDE GROUP FOR EACH EPOXIDE GROUP OF SAID EPOXY RESIN
Claim 2
Dependent Claim
84 words
COMPOSITION OF MATTER COMPRISING AN EPOXY RESIN SELECTED FROM THE GROUP CONSISTING OF GLYCIDYL POLYETHERS OF POLYHYDRIC ALCOHOLS AND GLYCIDYL POLYETHERS OF POLYHYDRIC PHENOLS AND HAVING A 1,2-EPOXIDE EQUIVALENCY GREATER THAN ONE AND A MIXTURE OF PYROMELLITIC DIANHYDRIDE AND MALEIC ANHYDRIDE IN WHICH FROM 25 TO 65% OF THE ANHYDRIDE GROUPS OF THE ANHYDRIDE MIXTURE ARE CONTRIBUTED BY THE PYROMELLITIC DIANHYDRIDE, THE AMOUNT OF THE ANHYDRIDE MIXTURE BEING THAT WHICH PROVIDES 0.7 TO 0.9 ANHYDRIDE GROUP FOR EACH EPOXIDE GROUP OF SAID EPOXY RESIN
References Cited (Backward Citations)
US2324483A
Cited
US2839495A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-09 | 1964-02-08 | 1964-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-09 | 1968-02-08 | 1968-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-09 | 1972-02-08 | 1972-08-09 | $7700.00 | Window Closed / Lapsed |