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Patent US3660039A successfully refreshed from Google Patents.
US3660039A
Expired / Lapsed
US
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Carbon black reactor with positionable choke
Assignee: Phillips Petroleum Co
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Filing: 1970-09-11
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Granted: 1972-05-02
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Expires: 1990-09-11
Abstract
Abstract Apparatus for producing carbon black in which a plug choke is variably positionable along the length of the first reaction section to vary its length or, at the extreme position of the choke, to eliminate the first section.
Inventors
- 👤 Eulas W Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:11
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; B; B01; B01J; B01J19/00; B01J19/0006
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
29 words
The carbon black reactor as defined in claim 1 in which said choke is adapted with an upstream-projecting lower portion and said plug is slidably positionable on said portion.
Claim 2
Dependent Claim
32 words
The carbon black reactor as defined in claim 1 in which said inlet conduit is positionable along the longitudinal axis of said first reactor section to discharge into said second reactor section.
Claim 3
Dependent Claim
31 words
The carbon black reactor as defined in claim 1 in which the downstream face of said choke is positionable in coinciding relationship with the upstream wall of said second reactor section.
Claim 4
Dependent Claim
29 words
The carbon black reactor as defined in claim 1 in which the downstream face of said plug is positionable in coinciding relationship with the downstream face of said choke.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |