Patent US3218369A successfully refreshed from Google Patents.
US3218369A
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Blend of brominated polygylcidyl ether, a liquid epoxycyclohexane resin and a liquidaliphatic polyglycidyl ether
Assignee: 3M Co
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Filing: 1961-01-06
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Granted: 1965-11-16
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Expires: 1981-01-06
Abstract
No abstract record available.
Inventors
- 👤 James R Hinkley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:18
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/32; C08G59/38; C08G59/22; C08G59/30; C08G59/40; C08G59/42; C08G59/4215; Y; Y10; Y10S; Y10S524/00; Y10S524/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A LOW VISCOSITY, STABLE BLEND OF EPOXY RESINS WHICH FORMS HEAT-CURABLE ADMIXTURES WITH POLYCARBOXYLIC ACID ANHYDRIDE AND TERTIARY AMINE CATALYST FOR THE PRODUCTION OF STRONG TOUGH FLAME-RETARDANT CURED PRODUCTS, SAID BLEND COMPRISING (1) AT LEAST 50% BY WEIGHT OF A POLYGLYCIDYL ETHER OF A POLYNUCLEAR PHENOL HAVING A PLURALITY OF BROMO GROUPS DIRECTLY ATTACHED TO NUCLEAR CARBON ATOMS, SAID ETHER BEING FREE FROM FUNCTIONAL GROUPS OTHER THAN HYDROXYL AND EPOXY GROUPS, (2) AT LEAST 20% OF A LIQUID ALIPHATIC POLYGLYCIDYL ETHER, AND (3) A MINOR AMOUNT UP TO 20% OF A LIQUID EPOXYCYCLOHEXANE RESIN.
Claim 2
Dependent Claim
94 words
A LOW VISCOSITY, STABLE BLEND OF EPOXY RESINS WHICH FORMS HEAT-CURABLE ADMIXTURES WITH POLYCARBOXYLIC ACID ANHYDRIDE AND TERTIARY AMINE CATALYST FOR THE PRODUCTION OF STRONG TOUGH FLAME-RETARDANT CURED PRODUCTS, SAID BLEND COMPRISING (1) AT LEAST 50% BY WEIGHT OF A POLYGLYCIDYL ETHER OF A POLYNUCLEAR PHENOL HAVING A PLURALITY OF BROMO GROUPS DIRECTLY ATTACHED TO NUCLEAR CARBON ATOMS, SAID ETHER BEING FREE FROM FUNCTIONAL GROUPS OTHER THAN HYDROXYL AND EPOXY GROUPS, (2) AT LEAST 20% OF A LIQUID ALIPHATIC POLYGLYCIDYL ETHER, AND (3) A MINOR AMOUNT UP TO 20% OF A LIQUID EPOXYCYCLOHEXANE RESIN.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |