Patent US2969347A successfully refreshed from Google Patents.
US2969347A
Expired / Lapsed
US
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Recovery of olefin polymers from solution
Assignee: —
•
Filing: —
•
Granted: 1961-01-24
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Expires: 1978-01-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:55
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/001; C08F6/003; C08L; C08L23/00; C08J; C08J2323/00; C08J2323/02; Y; Y10; Y10S; Y10S159/00; Y10S159/09; Y10S159/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
IN THE TREATMENT OF SOLID OLEFIN POLYMER WHICH IS A POLYMER OF 1-OLEFIN HAVING A MAXIMUM OF 8 CARBON ATOMS PER MOLECULE AND NO BRANCHING NEARER THE DOUBLE BOND THAN THE 4-POSITION PRECIPITATED FROM SOLUTION IN WHICH THE SOLVENT IS SEPARATED FROM THE POLYMER BY HEAT AND STRIPPING, SAID SOLVENT BEING SELECTED FROM THE GROUP CONSISTING OF PARAFFINS AND ALICYCLIC HYDROCARBONS HAVING 5 TO 12 CARBON ATOMS PER MOLECULE, DURING WHICH TREATMENT THE POLYMER PASSES THROUGH A RANGE OF POLYMERTO-SOLVENT CONCENTRATION WHEREIN IT TENDS TO AGGLOMERATE AND ADHERE TO METAL SURFACES, THE IMPROVEMENT WHICH COMPRISES INTRODUCING A SLURRY OF SIAD POLYMER IN SOLVENT IN A CONCENTRATION OF BETWEEN ABOUT 2 AND ABOUT 6 PERCENT TO A PRECONCENTRATING ZONE CONTAINING STEAM AND HAVING A SURFACE WETTED WITH HEATED MOVING WATER AND SPRAYIN THE SLURRY ONTO SAID WETTED SURFACE WHEREBY THE POLYMER IS DISPERSED IN THE WATER, SOLVENT IS VAPORIZED FROM THE SLURRY TO INCREASE THE POLYMER CONCENTRATION THEREOF TO ABOVE ABOUT 6 PERCENT, THEREBY PASSING THE SLURRY WITHOUT AGGLOMERATION THROUGH THE AGGOMERATING RANGE OF POLYMER CONCENTRATION.
Claim 2
Dependent Claim
175 words
IN THE TREATMENT OF SOLID OLEFIN POLYMER WHICH IS A POLYMER OF 1-OLEFIN HAVING A MAXIMUM OF 8 CARBON ATOMS PER MOLECULE AND NO BRANCHING NEARER THE DOUBLE BOND THAN THE 4-POSITION PRECIPITATED FROM SOLUTION IN WHICH THE SOLVENT IS SEPARATED FROM THE POLYMER BY HEAT AND STRIPPING, SAID SOLVENT BEING SELECTED FROM THE GROUP CONSISTING OF PARAFFINS AND ALICYCLIC HYDROCARBONS HAVING 5 TO 12 CARBON ATOMS PER MOLECULE, DURING WHICH TREATMENT THE POLYMER PASSES THROUGH A RANGE OF POLYMERTO-SOLVENT CONCENTRATION WHEREIN IT TENDS TO AGGLOMERATE AND ADHERE TO METAL SURFACES, THE IMPROVEMENT WHICH COMPRISES INTRODUCING A SLURRY OF SIAD POLYMER IN SOLVENT IN A CONCENTRATION OF BETWEEN ABOUT 2 AND ABOUT 6 PERCENT TO A PRECONCENTRATING ZONE CONTAINING STEAM AND HAVING A SURFACE WETTED WITH HEATED MOVING WATER AND SPRAYIN THE SLURRY ONTO SAID WETTED SURFACE WHEREBY THE POLYMER IS DISPERSED IN THE WATER, SOLVENT IS VAPORIZED FROM THE SLURRY TO INCREASE THE POLYMER CONCENTRATION THEREOF TO ABOVE ABOUT 6 PERCENT, THEREBY PASSING THE SLURRY WITHOUT AGGLOMERATION THROUGH THE AGGOMERATING RANGE OF POLYMER CONCENTRATION.
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) | 1964-01-24 | 1964-07-25 | 1965-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-24 | 1968-07-25 | 1969-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-24 | 1972-07-25 | 1973-01-24 | $7700.00 | Window Closed / Lapsed |