Patent US3291776A successfully refreshed from Google Patents.
US3291776A
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Process for curing polyepoxides with polymercaptans
Assignee: Shell USA Inc
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Filing: 1962-10-26
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Granted: 1966-12-13
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Expires: 1982-10-26
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Newey
- 👤 Paul A Devlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:49
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A PROCESS FOR CURING A POLYEPOXIDE HAVING MORE THAN ONE VIC-EPOXY GROUP AND SELECTED FROM THE GROUP CONSISTING OF GLYCIDYL POLYETHERS, POLYHYDRIC PHENOLS AND GLYCIDYL POLYETHERS OF POLYHYDRIC ALCOHOLS WITH AT LAST .8 EQUIVALENTS OF A LIQUID ALIPHATIC OR SIX-MEMBERED CYCLOALIPHATIC POLYMERICAPTAN HAVING A MOLECULAR WEIGHT LESS THAN ABOUT 3,000 IN CONTACT WITH FROM .05% TO 5% BY WEIGHT OF AN ORGANIC SULFIDE OF THE FORMULA R-S-R WHEREIN R IS A MEMBER OF THE GROUP CONSISTING OF ALIPHATIC HYDROCARBON RADICALS, SIX-MEMBERED CYCLOALIPHATIC HYDROCARBON RADICALS, AROMATIC HYDROCARBON RADICALS AND DERIVATIVES OF THE FOREGOING WHEREIN AT LEAST ONE OF THE
Claim 2
Dependent Claim
98 words
A PROCESS FOR CURING A POLYEPOXIDE HAVING MORE THAN ONE VIC-EPOXY GROUP AND SELECTED FROM THE GROUP CONSISTING OF GLYCIDYL POLYETHERS, POLYHYDRIC PHENOLS AND GLYCIDYL POLYETHERS OF POLYHYDRIC ALCOHOLS WITH AT LAST .8 EQUIVALENTS OF A LIQUID ALIPHATIC OR SIX-MEMBERED CYCLOALIPHATIC POLYMERICAPTAN HAVING A MOLECULAR WEIGHT LESS THAN ABOUT 3,000 IN CONTACT WITH FROM .05% TO 5% BY WEIGHT OF AN ORGANIC SULFIDE OF THE FORMULA R-S-R WHEREIN R IS A MEMBER OF THE GROUP CONSISTING OF ALIPHATIC HYDROCARBON RADICALS, SIX-MEMBERED CYCLOALIPHATIC HYDROCARBON RADICALS, AROMATIC HYDROCARBON RADICALS AND DERIVATIVES OF THE FOREGOING WHEREIN AT LEAST ONE OF THE
References Cited (Backward Citations)
US2789958A
Cited
US2915485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |