US3819710A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for improving color and color stability of ethanolamines
Assignee: Olin Corp
•
Filing: 1973-01-04
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Granted: 1974-06-25
•
Expires: 1993-01-04
Abstract
Abstract PROCESS FOR IMPROVING THE COLOR AND COLOR STABILITY OF ETHANOLAMINES BY HYDROGENATION OF CRUDE MONO-, DI- AND TRI-ETHANOLAMINE USING SELECTED CATALYST AT SELECTED TEMPERATURES AND PRESSURES.
Inventors
- 👤 T Jordan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:29
CPC Classifications
C; C07; C07C; C07C215/00; C07C215/02; C07C215/04; C07C215/06; C07C215/12
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) | 1977-06-24 | 1977-12-24 | 1978-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-24 | 1981-12-24 | 1982-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-24 | 1985-12-24 | 1986-06-25 | $7700.00 | Window Closed / Lapsed |