Patent US2957855A successfully refreshed from Google Patents.
US2957855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
From hydrocar
Assignee: —
•
Filing: —
•
Granted: 1960-10-25
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Expires: 1977-10-25
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:26
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/12; B; B29; B29B; B29B17/00; B29B17/02; C08J11/00; C08J11/04; C08J11/06; C08J11/08; B29B2017/0213; B29B2017/0293; B29K; B29K2023/00; B29K2023/04; B29K2023/06; C08J2323/00; C08J2323/02; C08J2323/04; C08J2323/06; Y; Y10; Y10S; Y10S159/00; Y10S159/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
82 words
IN THE PROCESS OF SEPARATING POLYMERIC 1-OLEFINS FROM HYDROCARBON SOLUTION THEREOF, THE IMPROVEMENT COMPRISING DISPERSING SAID SOLUTION INTO WATER OF LOWER TEMPERATURE AT A SOLUTION-TO-WATER RATIO THAT THE RESULTING DISPERSION TEMPERATURE IS BELOW THE PRECIPITATION TEMPERATURE OF THE 1-OLEFIN POLYMER, SAID DISPERSION BEING CARRIED OUT UNDER CONDITIONS TO MAINTAIN SAID HYDROCARBON AND WATER IN SUBSTANTIALLY LIQUID PHASE AND THEREAFTER SPRAYING THE RESULTING THREE PHASE DISPERSION THROUGH A VAPOR SPACE INTO WATER MAINTAINED AT A TEMPERATURE ABOVE THE VAPORIZATION TEMPERATURE OF SAID SOLVENT.
Claim 2
Dependent Claim
82 words
IN THE PROCESS OF SEPARATING POLYMERIC 1-OLEFINS FROM HYDROCARBON SOLUTION THEREOF, THE IMPROVEMENT COMPRISING DISPERSING SAID SOLUTION INTO WATER OF LOWER TEMPERATURE AT A SOLUTION-TO-WATER RATIO THAT THE RESULTING DISPERSION TEMPERATURE IS BELOW THE PRECIPITATION TEMPERATURE OF THE 1-OLEFIN POLYMER, SAID DISPERSION BEING CARRIED OUT UNDER CONDITIONS TO MAINTAIN SAID HYDROCARBON AND WATER IN SUBSTANTIALLY LIQUID PHASE AND THEREAFTER SPRAYING THE RESULTING THREE PHASE DISPERSION THROUGH A VAPOR SPACE INTO WATER MAINTAINED AT A TEMPERATURE ABOVE THE VAPORIZATION TEMPERATURE OF SAID SOLVENT.
Claim 3
Dependent Claim
26 words
THE PROCESS OF CLAIM 1 WHEREIN THE POLYMERIC OLEFIN IS A COPOLYMER OF ETHYLENE AND AT LEAST ONE OTHER 1-OLEFIN OF 2 TO 8 CARBON ATOMS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |