US2953557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of entrained polymer solids
Assignee: —
•
Filing: —
•
Granted: 1960-09-20
•
Expires: 1977-09-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:16
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/001; C08F6/003; C08L; C08L23/00; Y; Y10; Y10S; Y10S159/00; Y10S159/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
108 words
IN A PROCESS WHEREIN A NORMALLY SOLID POLYMER OF AN OLEFIN IS RECOVERED FROM ADMIXTURE WITH A LIQUED HYDROCARBON DILUENT BY STEPS COMPRISING VAPORIZATION OF SAID DILUENT BY CONTACT WITH STEAM AND SUBSEQUENT DRYING OF SAID POLYMER IN THE PRESENCE OF A STREAM OF GAS, THE IMPROVEMENT WHICH COMPRISES RECOVERING ENTRAINED POLYMER PARTICLES AND SAID HYDROCARBON FROM SAID GAS BY CONTACTING SAID GAS, AFTER SAID DRYING, WITH A STREAM OF WATER IN A SCRUBBING ZONE, AND PASSING A RESULTING AQUEOUS MIXTURE FROM SAID SCRUBBING ZONE TO A SETTLING ZONE WHEREIN SAID MIXTURE STRATIFIES TO FORM AN AQUEOUS PHASE AND A LIQUID HYDROCARBON PHASE HAVING SAID POLYMER ADMIXED THEREWITH.
References Cited (Backward Citations)
AT40971B
Cited
US1543942A
Cited
US2384967A
Cited
US2668754A
Cited
US2758068A
Cited
US2638437A
Cited
US2817689A
Cited
US2849433A
Cited
US2838477A
Cited
US2877866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-20 | 1964-03-21 | 1964-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-20 | 1968-03-21 | 1968-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-20 | 1972-03-21 | 1972-09-20 | $7700.00 | Window Closed / Lapsed |