US2989500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxy resin compositions
Assignee: Pfizer Inc
•
Filing: 1958-01-29
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Granted: 1961-06-20
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Expires: 1978-01-29
Abstract
No abstract record available.
Inventors
- 👤 Bavley Abraham
- 👤 Francis W Michelotti
- 👤 Albert E Timreck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:40
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/4207
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE THERMOSETTING RESIN COMPOSITION WHICH COMPRISES THE HEAT REACTION PRODUCT OF (1) A LIQUID EPOXY RESIN CONSISTING OF A POLYETHER, SAID POLYETHER CONTAINING AT LEAST TWO TERMINAL 1,2-EPOXY GROUPS PER MOLECULE OF EPOXY RESIN AND BEING PREPARED BY REACTING EPICHLOROHYDRIN WITH AN ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIHYDRIC ALCOHOLS AND DIHYDRIC PHENOLS, AND (2) FROM ABOUT 0.3 TO ABOUT 0.75 MOLE OF TRICARBALLYLIC ACID ANHYDRIDE PER MOLE OF EPOXY GROUP IN SAID EPOXY RESIN.
Claim 2
Dependent Claim
77 words
THE THERMOSETTING RESIN COMPOSITION WHICH COMPRISES THE HEAT REACTION PRODUCT OF (1) A LIQUID EPOXY RESIN CONSISTING OF A POLYETHER, SAID POLYETHER CONTAINING AT LEAST TWO TERMINAL 1,2-EPOXY GROUPS PER MOLECULE OF EPOXY RESIN AND BEING PREPARED BY REACTING EPICHLOROHYDRIN WITH AN ORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF DIHYDRIC ALCOHOLS AND DIHYDRIC PHENOLS, AND (2) FROM ABOUT 0.3 TO ABOUT 0.75 MOLE OF TRICARBALLYLIC ACID ANHYDRIDE PER MOLE OF EPOXY GROUP IN SAID EPOXY RESIN.
References Cited (Backward Citations)
US2324483A
Cited
US2569920A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |