US3629167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Two-package epoxy-urethane coating composition
Assignee: Shell USA Inc
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Filing: 1969-01-31
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Granted: 1971-12-21
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Expires: 1989-01-31
Abstract
Abstract A TWO-PACKAGE EPOXY-URETHANE COATING SYSTEM HAVING IMPROVED LOW TEMPERATURE CURING PROPERTIES COMPRISES: (1) A PRECONDENSATE PREPARED BY REACTING A POLYMERIC FATTY ACID, AN AMINE AND A POLYEPOXIDE HAVING MORE THAN ONE VIC-EPOXY GROUP AND (2) AN ORGANIC POLYISOCYANATE (OR POLYISOTHIOCYANATE).
Inventors
- 👤 Roy A Allen
- 👤 George R Somerville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:14
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6415; C08G18/643; C08G18/42; C08G18/4294; C08G18/46; C08G18/4615; C08G18/58; C08G18/581
Claims Analysis
Total Claims: 0
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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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |