Patent US4442491A successfully refreshed from Google Patents.
Patent US2728744A successfully refreshed from Google Patents.
US2728744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compositions containing a polyhydric alcohol and glycidyl ethers
Assignee: Shell Development Co
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Filing: 1952-03-29
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Granted: 1955-12-27
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Expires: 1972-03-29
Abstract
No abstract record available.
Inventors
- 👤 Clayton A May
- 👤 Edward C Shokal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:37
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
A COMPOSITION ADAPTED TO RESINIFY RAPIDLY UPON ADDITION THERETO OF AN AMINE CURING AGENT AND HEATING OF THE MIXTURE WHICH COMPRISES A GLYCIDYL ETHER WHICH IS FREE OF ELEMENTS OTHER THAN CARBON, HYDROGEN, OXYGEN AND CHLORINE, AND HAS A 1.2-EPOXY EQUIVALENCY GREATER THAN 1.0 AND A HYDROXYL VALUE OF LESS THAN 0.12 EQUIVALENTS OF ALCOHOLIC HYDROXYL GROUPS PER 100 GRAMS IN ADMIXTURE WITH AN ADDED NEUTRAL ALIPHATIC POLYHYDRIC ALCOHOL IN AMOUNT OF ABOIUT 0.07 TO 0.25 HYDROXYL EQUIVALENTS OF THE ALCOHOL PER 100 GRAMS OF THE ETHER, SAID ALCOHOL BEING FREE FROM REACTIVE GROUPS OTHER THAN ALCOHOLIC HYDROXYL GROUPS, AND ALSO BEING FREE OF ELEMENTS OTHER THAN CARBON, HYDROGEN AND OXYGEN.
Claim 2
Dependent Claim
111 words
A COMPOSITION ADAPTED TO RESINIFY RAPIDLY UPON ADDITION THERETO OF AN AMINE CURING AGENT AND HEATING OF THE MIXTURE WHICH COMPRISES A GLYCIDYL ETHER WHICH IS FREE OF ELEMENTS OTHER THAN CARBON, HYDROGEN, OXYGEN AND CHLORINE, AND HAS A 1.2-EPOXY EQUIVALENCY GREATER THAN 1.0 AND A HYDROXYL VALUE OF LESS THAN 0.12 EQUIVALENTS OF ALCOHOLIC HYDROXYL GROUPS PER 100 GRAMS IN ADMIXTURE WITH AN ADDED NEUTRAL ALIPHATIC POLYHYDRIC ALCOHOL IN AMOUNT OF ABOIUT 0.07 TO 0.25 HYDROXYL EQUIVALENTS OF THE ALCOHOL PER 100 GRAMS OF THE ETHER, SAID ALCOHOL BEING FREE FROM REACTIVE GROUPS OTHER THAN ALCOHOLIC HYDROXYL GROUPS, AND ALSO BEING FREE OF ELEMENTS OTHER THAN CARBON, HYDROGEN AND OXYGEN.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |