US3560164A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon black reactor
Assignee: Phillips Petroleum Co
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Filing: 1969-07-30
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Granted: 1971-02-02
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Expires: 1989-07-30
Abstract
Abstract A CARBON BLACK REACTOR IN WHICH THE REACTION ZONE AND QUENCH ZONE ARE FORMED TO CASTABLE MATERIALS WITH THE FEED INTRODUCTION ZONE BEING FORMED OF REFRACTORY BRICK AND PRECAST SHAPES AND CLOSED BY A REMOVABLE COVER INSULATED TO FORM A SUSPENDED ARCH CONSTRUCTION.
Inventors
- 👤 Charles R Venable Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 01:46
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; B; B01; B01J; B01J19/00; B01J19/0006
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |