US2767158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Epoxide resins cured by alcoholates of polyvalent metals
Assignee: Hoechst AG Werk Kalle Albert
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Filing: 1952-05-28
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Granted: 1956-10-16
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Expires: 1972-05-28
Abstract
No abstract record available.
Inventors
- 👤 Schlenker Felix
- 👤 Starck Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:09
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/681; C08G59/682
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
A PROCESS FOR PRODUCING IMPROVED EPOXIDE RESINS WHICH COMPRISES INCORPORATING IN AN EPOXIDE RESIN CONTAINING FREE EPOXIDE GROUPS AND DERIVED BY THE REACTION OF A POLYHYDROXY PHENOL WITH EPICHLORHYDRIN, A CATALYTIC AMOUNT OF A HARDENING AGENT COMPOSED OF AN ALCOHOLATE OF A METAL SELECTED FROM THE GROUP CONSISTING OF COBALT, MANGANESE, ZINC, COPPER, ALUMINUM, IRON, TITANIUM AND TIN ALCOHOLATES, THE ALCOHOLATE RADICAL BEING OF A HYDROXY COMPOUND SELECTED FROM THE GROUP CONSISTING OF THE BUTYL-, AMYL- BENZYL-, AND CYCLOHEXYL- ALCOHOLS, GLYCOL, POLYGLYCOL AND A GLYCOL MONOETHER.
References Cited (Backward Citations)
US2582985A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-16 | 1960-04-16 | 1960-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-16 | 1964-04-16 | 1964-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-16 | 1968-04-16 | 1968-10-16 | $7700.00 | Window Closed / Lapsed |