Patent US2561256A successfully refreshed from Google Patents.
US2561256A
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Method of drying synthetic rubber polymers
Assignee: Standard Oil Development Co
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Filing: 1948-05-22
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Granted: 1951-07-17
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Expires: 1968-05-22
Abstract
No abstract record available.
Inventors
- 👤 Howard L Wilson
- 👤 Robert F Leary
- 👤 Joseph F Nelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:34
CPC Classifications
F; F26; F26B; F26B5/00; F26B5/005; C; C08; C08F; C08F6/00; C08F6/24; Y; Y10; Y10S; Y10S159/00; Y10S159/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
IN A POLYMERIZATION PROCESS FOR THE SEPARATION OF SOLID POLYMER FROM A SLURRY OF POLYMER IN UNPOLYMERIZED MATERIAL, THE IMPROVEMENT WHICH COMPRISES DISCHARGING SAID SLURRY ONTO A VORTEX OF WATER HEATED TO A TEMPERATURE BETWEEN 100* F. AND 185* F., THE SAID VORTEX HAVING A NONTURBULENT INNER SURFACE CONTAINING A WATER INSOLUBLE SOAP OF AN ORGANIC ACID HAVING FROM 9 TO 30 INCLUSIVE CARBON ATOMS PER MOLECULE AND A METAL SELECTED FROM THE GROUPS 2 AND 3 OF THE PERIODIC TABLE HAVING A MOLECULE WEIGHT WITHIN THE RANGE BETWEEN 20 AND 125, WHEREBY THE UNPOLYMERIZED MATERIAL IS VOLATILIZED FROM THE MIXTURE AND THE SOAP IS ADSORBED ONTO THE POLYMER TO YIELD A NEARLY DRY WATER REPELLENT MASS OF POLYMER PARTICLES FLOATING UPON THE SURFACE OF THE WATER VORTEX, AND SEPARATING THE POLYMER PARTICLES FROM THE VORTEX.
Claim 2
Dependent Claim
136 words
IN A POLYMERIZATION PROCESS FOR THE SEPARATION OF SOLID POLYMER FROM A SLURRY OF POLYMER IN UNPOLYMERIZED MATERIAL, THE IMPROVEMENT WHICH COMPRISES DISCHARGING SAID SLURRY ONTO A VORTEX OF WATER HEATED TO A TEMPERATURE BETWEEN 100* F. AND 185* F., THE SAID VORTEX HAVING A NONTURBULENT INNER SURFACE CONTAINING A WATER INSOLUBLE SOAP OF AN ORGANIC ACID HAVING FROM 9 TO 30 INCLUSIVE CARBON ATOMS PER MOLECULE AND A METAL SELECTED FROM THE GROUPS 2 AND 3 OF THE PERIODIC TABLE HAVING A MOLECULE WEIGHT WITHIN THE RANGE BETWEEN 20 AND 125, WHEREBY THE UNPOLYMERIZED MATERIAL IS VOLATILIZED FROM THE MIXTURE AND THE SOAP IS ADSORBED ONTO THE POLYMER TO YIELD A NEARLY DRY WATER REPELLENT MASS OF POLYMER PARTICLES FLOATING UPON THE SURFACE OF THE WATER VORTEX, AND SEPARATING THE POLYMER PARTICLES FROM THE VORTEX.
References Cited (Backward Citations)
US2462123A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |