US3575926A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for curing polyepoxides with an aliphatic polyamine in the presence of a n -(aminoalkyl)piperazine dicyandiamide and an imidazole
Assignee: Shell USA Inc
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Filing: 1968-10-14
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Granted: 1971-04-20
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Expires: 1988-10-14
Abstract
Abstract A PROCESS FOR ROOM TEMPERATURE CURING POLYEPOXIDES, SUCH AS GLYCIDYL POLYETHERS OF POLYHDRIC PHENOLS IS DISCLOSED. THIS PROCESS COMPRISES MIXING AND REACTING A POLYEPOXIDE WITH AN ALIPHATIC POLYAMINE IN THE PRESENCE OF AN N-(AMINO ALKYL)PIPERAZINE, DICYANDIAMIDE AND AN IMIDAZOLE. USE OF THE PROCESS FOR PREPARING ADHESIVE COMPOSITIONS IS ALSO DISCLOSED.
Inventors
- 👤 James Donald Joyce
- 👤 Lawrence Charles Reilly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:24
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/56; C08G59/4007; C08G59/4014; C08G59/4021
Claims Analysis
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |