US3838076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane foams from partially aminated polyether polyols
Assignee: Texaco Inc
•
Filing: 1973-03-12
•
Granted: 1974-09-24
•
Expires: 1993-03-12
Abstract
Abstract CELLULAR POLYURETHANE FOAMS ARE PREPARED BY REACTING, IN THE PRESENCE OF A BLOWING ATENT, AN ORGANIC POLYISOCYANATE AND A POLYOXYALKYLENE RESIN HAVING A FUNCTIONALITY OF FROM 2 TO 8 AND AN EQUIVALENT WEIGHT OF FROM ABOUT 900 TO ABOUT 2800. THE TERMINAL GROUPS OF THE POLYOXYALKYLENE RESINS ARE FROM 15 TO ABOUT 55 AMINO GROUPS, WITH THE REMAINING FUNCTIONAL GROUPS BEING HYDROXYL GROUPS.
Inventors
- 👤 P Moss
- 👤 M Cuscurida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:30
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5024
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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |