US3420794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for curing polyepoxides with a polyamine and resulting products
Assignee: Shell USA Inc
•
Filing: 1963-08-29
•
Granted: 1969-01-07
•
Expires: 1983-08-29
Abstract
No abstract record available.
Inventors
- 👤 Clayton A May
- 👤 Charles T Badenhop
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:05
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/68; C08G59/686; C08G59/40; C08G59/50; C08G59/5006; C08G59/502; C08G59/56
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2682490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |