US3799745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon black reactor
Assignee: Phillips Petroleum Co
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Filing: 1971-06-30
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Granted: 1974-03-26
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Expires: 1991-06-30
Abstract
Abstract A CARBON BLACK REACTOR HAVING A MINIMUM CROSS-SECTIONAL AREA POSITIONED UPSTREAM OF THE LOCUS OF DISCHARGE FROM THE HYDROCARBON FEED INLET MEANS, THE WALLS OF THE REACTOR DIVERGING OUTWARDLY FROM THAT LOCUS TO A VERTICALLY UPSTANDING WALL TERMINATING THE ZONE.
Inventors
- 👤 P Cheng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:03
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; B; B01; B01J; B01J19/00
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) | 1977-03-25 | 1977-09-24 | 1978-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-25 | 1981-09-24 | 1982-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-25 | 1985-09-24 | 1986-03-26 | $7700.00 | Window Closed / Lapsed |