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US3674433A
Expired / Lapsed
US
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Modification of feedstock oil with rubber in carbon black process
Assignee: Cities Service Co
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Filing: 1970-09-21
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Granted: 1972-07-04
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Expires: 1990-09-21
Abstract
Abstract OLD TIRE RUBBER IS DIGESTED IN A CARBON BLACK FEEDSTOCK OIL. THE RESULTING MODIFIED OIL IS THEN THERMALLY DECOMPOSED TO PRODUCE CARBON BLACK WHICH IS RECOVERED AND INCORPORATED INTO END-USE PRODUCTS, E.G. NEW AUTOMOBILE TIRES. DISPOSAL OF OLD TIRES IS THUS ACCOMPLISHED WITHOUT POLLUTION OF THE ATMOSPHERE. THE AMOUNT OF RUBBER DIGESTED IN THE OIL IS IN EXCESS OF ABOUT 10 WEIGHT PERCENT AND CAN RANGE UP TO ABOUT 30 WEIGHT PERCENT. THE RESULTING MODIFIED FEEDSTOCK OIL CAN BE EFFECTIVELY UTILIZED TO MAKE CARBON BLACK WHILE EMPLOYING CONVENTIONAL PUMPING, METERING, SPRAYING AND THERMAL DECOMPOSITION MEANS.
Inventors
- 👤 Glenn O Wyatt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:01
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |