US3042970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particulation of polymer by extruding a solution thereof into a liquid stream of fluid
Assignee: Wyeth Holdings LLC
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Filing: 1961-08-14
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Granted: 1962-07-10
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Expires: 1981-08-14
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Terenzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:19
CPC Classifications
B; B29; B29B; B29B9/00; Y; Y10; Y10S; Y10S159/00; Y10S159/10; Y10S159/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A METHOD OF SEPARATING A HIGHLY VISCOUS POLYMERIC SOLUTION INTO PARTICULATE CYLINDRICAL FORM WHICH COMPRISES EXTRUDING THE HIGHLY VISCOUD POLYMERIC SOLUTION INTO A STREAM OF LIQUID VOLATILE NON-SOLVENT FLOWING AT A SUBSTANTIALLY RIGHT ANGLE TO THE EXTRUDED SOLUTION, THE FLOW OF SAID NON-SOLVENT STREAM HAVING A VELOCITY SUFFICIENT TO DEVELOP ENOUGH DRAG FORCE ON THE EXTRUDED POLYMERIC SOLUTION TO CAUSE TENSILE SHEAR OF THE EXTRUDED SOLUTION AND RECOVERING PARTICLES OF SAID POLYMERIC SOLUTION FROM SAID NON-SOLVENT, WHEREIN SAID PARTICLES HAVE A LENGTH OF LESS THAN ABOUT TWO INCHES AND A DIAMETER OF FROM ABOUT 1/32 INCH TO ABOUT 1/8 INCH AND WHEREIN SAID NON-SOLVENT IS PARTIALLY SOLUBLE IN THE SOLVENT FOR THE POLYMER, IS INERT TO SAID POLYMERIC MATERIAL AND IS OF SUCH A CHARACTER THAT THE POLYMERIC MATERIAL AND IS SUBSTANTIALLY INSOLUBLE THEREIN.
Claim 2
Independent Claim
134 words
A METHOD OF SEPARATING A HIGHLY VISCOUS POLYMERIC SOLUTION INTO PARTICULATE CYLINDRICAL FORM WHICH COMPRISES EXTRUDING THE HIGHLY VISCOUD POLYMERIC SOLUTION INTO A STREAM OF LIQUID VOLATILE NON-SOLVENT FLOWING AT A SUBSTANTIALLY RIGHT ANGLE TO THE EXTRUDED SOLUTION, THE FLOW OF SAID NON-SOLVENT STREAM HAVING A VELOCITY SUFFICIENT TO DEVELOP ENOUGH DRAG FORCE ON THE EXTRUDED POLYMERIC SOLUTION TO CAUSE TENSILE SHEAR OF THE EXTRUDED SOLUTION AND RECOVERING PARTICLES OF SAID POLYMERIC SOLUTION FROM SAID NON-SOLVENT, WHEREIN SAID PARTICLES HAVE A LENGTH OF LESS THAN ABOUT TWO INCHES AND A DIAMETER OF FROM ABOUT 1/32 INCH TO ABOUT 1/8 INCH AND WHEREIN SAID NON-SOLVENT IS PARTIALLY SOLUBLE IN THE SOLVENT FOR THE POLYMER, IS INERT TO SAID POLYMERIC MATERIAL AND IS OF SUCH A CHARACTER THAT THE POLYMERIC MATERIAL AND IS SUBSTANTIALLY INSOLUBLE THEREIN.
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) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |