US2965629A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinning band
Assignee: —
•
Filing: —
•
Granted: 1960-12-20
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Expires: 1977-12-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:22
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/88; C08G63/90; C08F; C08F10/00; C08F110/00; C08F110/02; C08F2/00; C08F2/12; C08F2/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
186 words
AN IMPROVED METHOD FOR REMOVING SUSPENDED SOLIDS FROM A SOLUTION OF A SOLID POLYMER IN A SOLVENT WHICH COMPRISES PASSING SAID SOLUTION CONTAINING SAID SOLIDS INTO A SUBSTANTIALLY VERTICAL, CYLINDRICAL ZONE SUBSTANTIALLY DIVIDED INTO TWO EQUAL PORTIONS BY A VERTICAL IMPERVIOUS PARTITION, AT ABOUT THE TEMPERATURE OF INCIPIENT PRECIPITATION OF POLYMER FROM SOLUTION, ROTATING THE PARTITION ABOUT ITS VERTICAL AXIS AS A SOLIDS AGGLOMERATION RATE BUT IN SUFFICIENT TO PREVENT GRAVITATION OF AGGLOMERATED SOLIDS SO AS TO EFFECT AGGLOMERATION OF SAID SOLIDS INTO PARTICLES OF SUFFICIENT BULK TO GRAVITATE FROM THE SOLUTION, PASSING GRAVITATING SOLIDS INTO A ZONE BELOW AND CONTIGUOUS WITH SAID FIRST NAMED ZONE, RECOVERING POLYMER SOLUTION FROM THE UPPER PORTION OS SAID FIRST NAMED ZONE, MEASURING THE AGGLOMERATE AND CATALYST CONTENT OF THE RECOVERED POLYMER SOLUTION, REGULATING THE RATE OF ROTATION OF SAID PARTITION SO AS TO MAINTAIN THE AGGLOMERATEAND CATALYST CONTENT OF SAID RECOVERED POLYMER SOLUTION AT A MINIMUM, INTRODUCING LIQUID INTO SAID ZONE BELOW SAID FIRST-NAMED ZONE AT A RATE SUFFICIENT TO MAINTAIN A LIQUID INTERFACE BETWEEN SAID ZONES, AND REMOVING AGGLOMERATED SOLIDS FROM SAID ZONE BELOW SAID FIRST NAMED ZONE.
Claim 2
Dependent Claim
186 words
AN IMPROVED METHOD FOR REMOVING SUSPENDED SOLIDS FROM A SOLUTION OF A SOLID POLYMER IN A SOLVENT WHICH COMPRISES PASSING SAID SOLUTION CONTAINING SAID SOLIDS INTO A SUBSTANTIALLY VERTICAL, CYLINDRICAL ZONE SUBSTANTIALLY DIVIDED INTO TWO EQUAL PORTIONS BY A VERTICAL IMPERVIOUS PARTITION, AT ABOUT THE TEMPERATURE OF INCIPIENT PRECIPITATION OF POLYMER FROM SOLUTION, ROTATING THE PARTITION ABOUT ITS VERTICAL AXIS AS A SOLIDS AGGLOMERATION RATE BUT IN SUFFICIENT TO PREVENT GRAVITATION OF AGGLOMERATED SOLIDS SO AS TO EFFECT AGGLOMERATION OF SAID SOLIDS INTO PARTICLES OF SUFFICIENT BULK TO GRAVITATE FROM THE SOLUTION, PASSING GRAVITATING SOLIDS INTO A ZONE BELOW AND CONTIGUOUS WITH SAID FIRST NAMED ZONE, RECOVERING POLYMER SOLUTION FROM THE UPPER PORTION OS SAID FIRST NAMED ZONE, MEASURING THE AGGLOMERATE AND CATALYST CONTENT OF THE RECOVERED POLYMER SOLUTION, REGULATING THE RATE OF ROTATION OF SAID PARTITION SO AS TO MAINTAIN THE AGGLOMERATEAND CATALYST CONTENT OF SAID RECOVERED POLYMER SOLUTION AT A MINIMUM, INTRODUCING LIQUID INTO SAID ZONE BELOW SAID FIRST-NAMED ZONE AT A RATE SUFFICIENT TO MAINTAIN A LIQUID INTERFACE BETWEEN SAID ZONES, AND REMOVING AGGLOMERATED SOLIDS FROM SAID ZONE BELOW SAID FIRST NAMED ZONE.
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) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |