Patent US3350342A successfully refreshed from Google Patents.
US3350342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Masterbatching rubber cement and rubber reinforcing agents
Assignee: Phillips Petroleum Co
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Filing: 1962-08-06
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Granted: 1967-10-31
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Expires: 1982-08-06
Abstract
No abstract record available.
Inventors
- 👤 John W Begley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:18
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/74; B29B7/7476; B29B7/7495; B29K; B29K2021/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
187 words
A METHOD FOR TRANSFERRING CARBON BLACK FROM AN AQUEOUS CARBON BLACK SLURRY TO A SOLUTION OF RUBBER IN A SOLVENT FOR RUBBER, SAID SOLVENT FOR RUBBER BEING A NONSOLVENT FOR CARBON BLACK, COMPRISING CONTACTING SAID AQUEOUS SLURRY WITH SAID SOLUTION OF RUBBER AT A HIGH SHEAR RATE BY PASSING SAID AQUEOUS CARBON BLACK SLURRY INTO ONE END OF A HOLLOW ZONE OF CIRCULAR CROSS SECTION, PASSING SAID SOLUTION OF RUBBER INTO THE OTHER END OF SAID ZONE, PASSING SAID SLURRY AND SAID SOLUTION OUTWARDLY THROUGH A PERFORATION IN THE SIDE WALL OF SAID ZONE BY CENTRIFUGAL FORCE UPON ROTATING SAID ZONE AT A HIGH RATE OF SPEED ON ITS AXIS, EXPENDING IN SAID ZONE AT LEAST 0.015 HORSEPOWER HOUR PER POUND OF RESULTING RUBBER SOLUTION, THEREBY EXPOSING SAID SLURRY AND SOLUTION TO A HIGH RATE OF SHEAR AS SAID SLURRY AND SAID SOLUTION EXIT FROM SAID PERFORATION THEREBY PRODUCING A RUBBER SOLUTION RICH IN CARBON BLACK AND AN AQUEOUS PHASE LEAN IN CARBON BLACK, SEPARATING THE RESULTING RUBBER SOLUTION RICH IN CARBON BLACK FROM THE AQUEOUS PHASE, LEAN IN CARBON BLACK, AND SEPARATELY RECOVERING SAID RUBBER SOLUTION.
Claim 2
Independent Claim
187 words
A METHOD FOR TRANSFERRING CARBON BLACK FROM AN AQUEOUS CARBON BLACK SLURRY TO A SOLUTION OF RUBBER IN A SOLVENT FOR RUBBER, SAID SOLVENT FOR RUBBER BEING A NONSOLVENT FOR CARBON BLACK, COMPRISING CONTACTING SAID AQUEOUS SLURRY WITH SAID SOLUTION OF RUBBER AT A HIGH SHEAR RATE BY PASSING SAID AQUEOUS CARBON BLACK SLURRY INTO ONE END OF A HOLLOW ZONE OF CIRCULAR CROSS SECTION, PASSING SAID SOLUTION OF RUBBER INTO THE OTHER END OF SAID ZONE, PASSING SAID SLURRY AND SAID SOLUTION OUTWARDLY THROUGH A PERFORATION IN THE SIDE WALL OF SAID ZONE BY CENTRIFUGAL FORCE UPON ROTATING SAID ZONE AT A HIGH RATE OF SPEED ON ITS AXIS, EXPENDING IN SAID ZONE AT LEAST 0.015 HORSEPOWER HOUR PER POUND OF RESULTING RUBBER SOLUTION, THEREBY EXPOSING SAID SLURRY AND SOLUTION TO A HIGH RATE OF SHEAR AS SAID SLURRY AND SAID SOLUTION EXIT FROM SAID PERFORATION THEREBY PRODUCING A RUBBER SOLUTION RICH IN CARBON BLACK AND AN AQUEOUS PHASE LEAN IN CARBON BLACK, SEPARATING THE RESULTING RUBBER SOLUTION RICH IN CARBON BLACK FROM THE AQUEOUS PHASE, LEAN IN CARBON BLACK, AND SEPARATELY RECOVERING SAID RUBBER SOLUTION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-30 | 1971-05-01 | 1971-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-30 | 1975-05-01 | 1975-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-30 | 1979-05-01 | 1979-10-31 | $7700.00 | Window Closed / Lapsed |