US3808328A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of carbon black from feedstock oil modified with rubber
Assignee: Columbian Carbon Co
•
Filing: 1969-12-10
•
Granted: 1974-04-30
•
Expires: 1989-12-10
Abstract
Abstract RUBBER IS INCORPORATED WITH A LIQUID HYDROCARBON TO PRODUCE A CARBON BLACK FEEDSTOCK OIL. SCRAP RUBBER, ESPECIALLY OLD AUTOMOBILE TIRES, IS THUS UTILIZED FOR COMMERCIAL PRODUCTION OF CARBON BLACK. MORE PARTICULARLY, SCRAP TIRES ARE DIGESTED IN AN AROMATIC CARBON BLACK FEED STOCK OIL, E.G. BMCI OF ABOUT 90 TO ABOUT 160, TO DISSOLVE THE RUBBER AND TO SUSPEND INSOLUBLE COMPONENTS OF THE TIRE COMPOUND WITHIN THE OIL. THE RESULTANT LIQUID FEEDSTOCK IS THEN THERMALLY DECOMPOSED IN ACCORDANCE WITH CONVENTIONAL PRACTICES FOR PRODUCING COMMERCIALLY AVAILABLE GRADES OF CARBON BLACK.
Inventors
- 👤 W Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:46
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/482; C09C1/50; C01; C01P; C01P2006/00; C01P2006/19
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1977-04-29 | 1977-10-29 | 1978-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-29 | 1981-10-29 | 1982-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-29 | 1985-10-29 | 1986-04-30 | $7700.00 | Window Closed / Lapsed |