US3590026A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of polymers from solution
Assignee: Phillips Petroleum Co
•
Filing: 1969-01-03
•
Granted: 1971-06-29
•
Expires: 1989-01-03
Abstract
Abstract RECOVERY OF POLYMERS FROM SOLUTIONS THEREOF IN A HYDROCARBON SOLVENT BY A STEAM STRIPPING PROCESS IN WHICH WATER CONTAINING MAGNESIUM OR CALCIUM IONS IS EMPLOYED TO INCREASE EFFECTIVENESS OF DISPERSING AGENTS EMPLOYED TO PREVENT AGGLOMERATION OF POLYMERS. THE HARD WATER IS INTRODUCED INTO THE SYSTEM AT A LOCATION TO ACCOMPLISH THE ABOVE OBJECT AND TO PROVIDE ADDITIONAL PROCESSING ADVANTAGES.
Inventors
- 👤 Rollin N Carlson
- 👤 Weldin G Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:04
CPC Classifications
C; C08; C08C; C08C2/00; C08C2/06; Y; Y10; Y10S; Y10S159/00; Y10S159/10
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |