Patent US2915489A successfully refreshed from Google Patents.
US2915489A
Expired / Lapsed
US
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Method of coagulating rubber latices
Assignee: Columbian Carbon Co
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Filing: 1956-09-19
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Granted: 1959-12-01
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Expires: 1976-09-19
Abstract
No abstract record available.
Inventors
- 👤 White James Wilfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:55
CPC Classifications
C; C08; C08C; C08C1/00; C08C1/14; C08C1/16; Y; Y10; Y10S; Y10S159/00; Y10S159/09; Y10S528/00; Y10S528/931; Y10S528/934; Y10S528/936
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
IN THE ACID COAGULATION OF RUBBER LATICES IN WHICH THE LATEX IS MIXED WITH AN ACID COAGULATING MEDIUM, THE STEPS OF ATOMIZING THE LATEX BY MEANS OF A GASEOUS MEDIUM UNDER SUPERATMOSPHERIC PRESSURE UPWARDLY INTO THE LOWER END OF A VERTICALLY ELONGATED CHAMBER CONTAINING A BODY OF THE ACID COAGULATING MEDIUM, MIXING THE LATEX WITH THE COAGULATING MEDIUM BY MEANS OF THE ATOMIZING ACTION, WITHOUT MECHANICAL AGITATION, FLOATING THE RESULTANT SPONGE-LIKE AGGLOMERATES OF COAGULATED RUBBER UPWARDLY THROUGH THE BODY OF ACID MEDIUM AND DISCHARGING THEM ALONG WITH A SUBSTANTIAL PROPORTION OF THE LATEX SERUM TO A SEPARATE CHAMBER AND THEREIN BREAKING UP THE AGGLOMERATES BY SUBJECTING THEM TO MECHANICAL AGITATION, PASSING THE RESULTANT RUBBER SUSPENSION FROM THE SECOND CHAMBER, SEPARATING THE SERUM THEREFROM AND RECIRCULATING AT LEAST A PORTION OF THE SEPARATED SERUM TO THE LOWER END OF THE FIRST SAID CHAMBER AND WASHING AND DRYING THE SEPARATED CRUMB RUBBER.
Claim 2
Dependent Claim
150 words
IN THE ACID COAGULATION OF RUBBER LATICES IN WHICH THE LATEX IS MIXED WITH AN ACID COAGULATING MEDIUM, THE STEPS OF ATOMIZING THE LATEX BY MEANS OF A GASEOUS MEDIUM UNDER SUPERATMOSPHERIC PRESSURE UPWARDLY INTO THE LOWER END OF A VERTICALLY ELONGATED CHAMBER CONTAINING A BODY OF THE ACID COAGULATING MEDIUM, MIXING THE LATEX WITH THE COAGULATING MEDIUM BY MEANS OF THE ATOMIZING ACTION, WITHOUT MECHANICAL AGITATION, FLOATING THE RESULTANT SPONGE-LIKE AGGLOMERATES OF COAGULATED RUBBER UPWARDLY THROUGH THE BODY OF ACID MEDIUM AND DISCHARGING THEM ALONG WITH A SUBSTANTIAL PROPORTION OF THE LATEX SERUM TO A SEPARATE CHAMBER AND THEREIN BREAKING UP THE AGGLOMERATES BY SUBJECTING THEM TO MECHANICAL AGITATION, PASSING THE RESULTANT RUBBER SUSPENSION FROM THE SECOND CHAMBER, SEPARATING THE SERUM THEREFROM AND RECIRCULATING AT LEAST A PORTION OF THE SEPARATED SERUM TO THE LOWER END OF THE FIRST SAID CHAMBER AND WASHING AND DRYING THE SEPARATED CRUMB RUBBER.
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) | 1962-11-30 | 1963-06-01 | 1963-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-30 | 1967-06-01 | 1967-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-30 | 1971-06-01 | 1971-12-01 | $7700.00 | Window Closed / Lapsed |