Patent US3297635A successfully refreshed from Google Patents.
US3297635A
Expired / Lapsed
US
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Process for curing polyepoxides and resulting products
Assignee: Shell USA Inc
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Filing: 1963-05-31
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Granted: 1967-01-10
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Expires: 1983-05-31
Abstract
No abstract record available.
Inventors
- 👤 Bergman Elliot
- 👤 Acetis William De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:15
CPC Classifications
C; C07; C07D; C07D323/00; C07D323/04; C07D323/06; C07D341/00; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/66
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A PROCESS FOR CURING AND RESINIFYING A POLYEPOXIDE HAVING MORE THAN ONE VIC-EPOXY GROUP WHICH COMPRISES MIXING AND REACTING THE POLYEPOXIDE WITH A HETEROCYCLIC COMPOUND SUBSTITUTED IN FROM 3 TO 5 DIFFERENT PLACES ON THE HETEROCYCLIC RING WITH A-SH RADICAL OR A-RSH RADICAL WHEREIN R IS AN ALIPHATIC HYDROCARBON RADICAL CONTAINING FROM 1 TO 6 CARBON ATS, THE HETEROATOM IN THE HETEROCYCLIC RING BEING A MEMBER OF THE GROUP CONSISTING OF OXYGEN, SULFUR AND NITROGEN.
Claim 2
Dependent Claim
75 words
A PROCESS FOR CURING AND RESINIFYING A POLYEPOXIDE HAVING MORE THAN ONE VIC-EPOXY GROUP WHICH COMPRISES MIXING AND REACTING THE POLYEPOXIDE WITH A HETEROCYCLIC COMPOUND SUBSTITUTED IN FROM 3 TO 5 DIFFERENT PLACES ON THE HETEROCYCLIC RING WITH A-SH RADICAL OR A-RSH RADICAL WHEREIN R IS AN ALIPHATIC HYDROCARBON RADICAL CONTAINING FROM 1 TO 6 CARBON ATS, THE HETEROATOM IN THE HETEROCYCLIC RING BEING A MEMBER OF THE GROUP CONSISTING OF OXYGEN, SULFUR AND NITROGEN.
References Cited (Backward Citations)
US2915485A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |