US3595618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of carbon black
Assignee: Union Carbide Corp
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Filing: 1969-07-22
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Granted: 1971-07-27
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Expires: 1989-07-22
Abstract
Abstract A PROCESS FOR MANUFACTURING CARBON BLACK WHICH CONSISTS OF INJECTING A HYDROGEN FEED MATERIAL INTO A STREAM OF VERY HOT, HIGH VELOCITY COMBUSTED GASES. THE VELOCITY MUST BE GREATER THAN 1,000 FEET PER SECOND, AND THE TEMPERATURE 4,000*F.-6,000*F. THE COMBUSTED GASES ARE OBTAINED BY BURNING FUEL WITH PURE OXYGEN OR OXYGEN ENRICHED AIR. THE PROCESS MAKES IT POSSIBLE TO OBTAIN CHANNEL GRADE CARBON BLACK BY MEANS OF A FURNACE PROCESS.
Inventors
- 👤 Kazuo Kiyonaga
- 👤 George H Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:11
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; C01; C01P; C01P2006/00; C01P2006/12; C01P2006/19
Claims Analysis
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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) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |