US2974131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of olefin polymers from solution
Assignee: —
•
Filing: —
•
Granted: 1961-03-07
•
Expires: 1978-03-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:46
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; B; B29; B29B; B29B17/00; B29B17/02; C08F; C08F6/00; C08F6/001; C08F6/005; B29K; B29K2023/00; B29K2023/04; B29K2023/06; Y; Y10; Y10S; Y10S159/00; Y10S159/09; Y10S159/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A PROCESS FOR PRECIPITATING SOLID OLEFIN POLYMERS FROM A HEATED SOLUTION THEREOF WHICH COMPRISES INTRODUCING A POLYMER SOLUTION TO A CONFINED PRECIPITATION ZONE CONTAINING AN INERT GAS PHASE AND HAVING A SURFACE WETTED WITH MOVING WATER DISPOSED TO PROVIDE DOWNWARD MOVEMENT OF SAID WATER, SAID WATER BEING AT A TEMPERATURE BELOW THE TEMPERATURE OF THE POLYMER SOLUTION, SPRAYING THE POLYMER SOLUTION ONTO SAID WETTED SURFACE WHEREBY POLYMER IS PRECIPITATED AND DISPERSED IN THE WATER AND REMOVING A MIXTURE OF POLYMER, WATER AND SOLVENT FROM THE PRECIPITATION ZONE.
Claim 2
Dependent Claim
87 words
A PROCESS FOR PRECIPITATING SOLID OLEFIN POLYMERS FROM A HEATED SOLUTION THEREOF WHICH COMPRISES INTRODUCING A POLYMER SOLUTION TO A CONFINED PRECIPITATION ZONE CONTAINING AN INERT GAS PHASE AND HAVING A SURFACE WETTED WITH MOVING WATER DISPOSED TO PROVIDE DOWNWARD MOVEMENT OF SAID WATER, SAID WATER BEING AT A TEMPERATURE BELOW THE TEMPERATURE OF THE POLYMER SOLUTION, SPRAYING THE POLYMER SOLUTION ONTO SAID WETTED SURFACE WHEREBY POLYMER IS PRECIPITATED AND DISPERSED IN THE WATER AND REMOVING A MIXTURE OF POLYMER, WATER AND SOLVENT FROM THE PRECIPITATION ZONE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |