US3437591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid polyether polyol composition and preparation
Assignee: Diamond Shamrock Corp
•
Filing: 1965-03-01
•
Granted: 1969-04-08
•
Expires: 1985-03-01
Abstract
No abstract record available.
Inventors
- 👤 Janis A Bungs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:26
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C07; C07F; C07F9/00; C07F9/90; C07F9/902; C08G18/08; C08G18/16; C08G18/22; C08G18/227
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2473735A
Cited
US2647910A
Cited
US3121067A
Cited
US3164558A
Cited
US3075928A
Cited
US3075927A
Cited
US3359218A
Cited
US3271344A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |