Patent US2475559A successfully refreshed from Google Patents.
Patent US2982763A successfully refreshed from Google Patents.
US2982763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
mcleod
Assignee: —
•
Filing: —
•
Granted: 1961-05-02
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Expires: 1978-05-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:24
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/001; C08F6/003; C08F6/02; C08F10/00; C08F10/02; C08F2/00; C08F2/04; C08F2/06; C08F6/005; C08L; C08L23/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A CONTINUOUS PROCESS FOR THE REMOVAL OF A SOLID POLYMER OF A 1-OLEFIN CONTAINING 2 TO 8 CARBON ATOMS FROM A SOLUTION THEREOF IN A HYDROCARBON SOLVENT WHICH COMPRISES INTRODUCING SAID SOLUTION INTO THE VAPOR PHASE OF A FLASH VAPORIZATION ZONE CONTAINING A VAPOR PHASE AND A LIQUID PHASE WHILE SIMULTANEOUSLY INTRODUCING GAS INERT TO SAID POLYMER TO SAID LIQUID PHASE TO MAINTAIN THE PRESSURE IN SAID ZONE AT A SUBSTANTIALLY CONSTANT VALUE SLIGHTLY ABOVE ATMOSPHERIC PRESSURE AND BELOW THE PRESSURE OF THE INCOMING POLYMER SOLUTION WHEREBY SOLVENT IS VAPORIZED AND A MAJOR PORTION OF POLYMER IS PRECIPITATED, AND REMOVING PRECIPITATED POLYMER AND POLYMER SOLUTION FROM SAID LIQUID PHASE.
Claim 2
Dependent Claim
109 words
A CONTINUOUS PROCESS FOR THE REMOVAL OF A SOLID POLYMER OF A 1-OLEFIN CONTAINING 2 TO 8 CARBON ATOMS FROM A SOLUTION THEREOF IN A HYDROCARBON SOLVENT WHICH COMPRISES INTRODUCING SAID SOLUTION INTO THE VAPOR PHASE OF A FLASH VAPORIZATION ZONE CONTAINING A VAPOR PHASE AND A LIQUID PHASE WHILE SIMULTANEOUSLY INTRODUCING GAS INERT TO SAID POLYMER TO SAID LIQUID PHASE TO MAINTAIN THE PRESSURE IN SAID ZONE AT A SUBSTANTIALLY CONSTANT VALUE SLIGHTLY ABOVE ATMOSPHERIC PRESSURE AND BELOW THE PRESSURE OF THE INCOMING POLYMER SOLUTION WHEREBY SOLVENT IS VAPORIZED AND A MAJOR PORTION OF POLYMER IS PRECIPITATED, AND REMOVING PRECIPITATED POLYMER AND POLYMER SOLUTION FROM SAID LIQUID PHASE.
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) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |