Patent US2884406A successfully refreshed from Google Patents.
US2884406A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of cured epoxide resins
Assignee: Bayer AG
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Filing: 1956-09-11
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Granted: 1959-04-28
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Expires: 1976-09-11
Abstract
No abstract record available.
Inventors
- 👤 Wegler Richard
- 👤 Frank Gunter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:18
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/42; C08G59/20; C08G59/22; C08G59/226; C08G59/28; C08G59/32; C08G59/3227; C08G59/38; C08G59/4215
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
IN A PROCESS OF CURING A NON-BASIC POLYGLYCIDYL ETHER OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A POLYHYDRIC ALCOHOL AND A POLYHYDRIC PHENOL AT ELEVATED TEMPERATURE BY MEANS OF A CURING AMOUNT OF A CURING COMPOUND SELECTED FROM THE GROUP CONSISTING OF A CYCLIC ACID ANHYDRIDE, A POLYBASIC ORGANIC ACID, AND AN INORGANIC ACID, THE IMPROVEMENT WHICH COMPRISES CURING SAID POLYGLYCIDYL ETHER IN ADMIXTURE WITH SAID CURING COMPOUND AND IN ADMIXTURE WITH 0.1-5% BY WEIGHT, BASED ONO THE POLYGLYCIDYL ETHER , OF AN ORGANIC TERTIARY AMINE CATALYST CONTAINING AT LEAST ONE TERTIARY NITROGEN ATOM TO WHICH IS BOUND AT LEAST ONE 2,3-EPOXYPROPYL GROUP, AT LEAST TWO 2.3-EPOXYPROPYL GROUPS BEING PRESENT IN SAID CATALYST SAID CATALYST CONTAINING NO OTHER GROUPS REACTIVE WITH POLYGLYCIDYL ETHERS AND ACID ANHYDRIDED.
Claim 2
Dependent Claim
128 words
IN A PROCESS OF CURING A NON-BASIC POLYGLYCIDYL ETHER OF A COMPOUND SELECTED FROM THE GROUP CONSISTING OF A POLYHYDRIC ALCOHOL AND A POLYHYDRIC PHENOL AT ELEVATED TEMPERATURE BY MEANS OF A CURING AMOUNT OF A CURING COMPOUND SELECTED FROM THE GROUP CONSISTING OF A CYCLIC ACID ANHYDRIDE, A POLYBASIC ORGANIC ACID, AND AN INORGANIC ACID, THE IMPROVEMENT WHICH COMPRISES CURING SAID POLYGLYCIDYL ETHER IN ADMIXTURE WITH SAID CURING COMPOUND AND IN ADMIXTURE WITH 0.1-5% BY WEIGHT, BASED ONO THE POLYGLYCIDYL ETHER , OF AN ORGANIC TERTIARY AMINE CATALYST CONTAINING AT LEAST ONE TERTIARY NITROGEN ATOM TO WHICH IS BOUND AT LEAST ONE 2,3-EPOXYPROPYL GROUP, AT LEAST TWO 2.3-EPOXYPROPYL GROUPS BEING PRESENT IN SAID CATALYST SAID CATALYST CONTAINING NO OTHER GROUPS REACTIVE WITH POLYGLYCIDYL ETHERS AND ACID ANHYDRIDED.
References Cited (Backward Citations)
US2730531A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |