US3654370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing polyoxyalkylene polyamines
Assignee: Texaco Inc
•
Filing: 1970-08-28
•
Granted: 1972-04-04
•
Expires: 1990-08-28
Abstract
Abstract ARE PREPARED BY TREATING THE CORRESPONDING POLOXYALKYLENE POLYOLS WITH AMMONIA AND HYDROGEN OVER A CATALYST PREPARED BY THE REDUCTION OF A MIXTURE OF A THE OXIDES OF NICKEL, COPPER AND CHROMIUM. THESE POLYAMINES ARE USEFUL AS CURING AGENTS FOR EPOXY RESINS, AS PLASTICIZERS, AS CROSS-LINKING AGENTS OR BINDERS FOR TEXTILES AND AS AN INTERMEDIATES IN THE PREPARATION OF POLYUREAS. THE POLYOXYALKYLENE POLYOLS MAY BE OBTAINED BY THE ADDITION OF ONE OR MORE ALKYLENE OXIDES TO AN ALIPHATIC POLYHYDRIC ALCOHOL. R-((O-CH2-CH(-X))N-O-CH(-Y)-CH(-Z)-NH2)M POLYOXYALKYLENE POLYAMINES HAVING THE FORMULA:
Inventors
- 👤 Ernest L Yeakey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:41
CPC Classifications
C; C07; C07D; C07D265/00; C07D265/28; C07D265/30; C08; C08K; C08K5/00; C08K5/16; C08K5/17; C08L; C08L63/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1975-04-04 | 1975-10-04 | 1976-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-04 | 1979-10-04 | 1980-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-04 | 1983-10-04 | 1984-04-04 | $7700.00 | Window Closed / Lapsed |