Patent US3753658A successfully refreshed from Google Patents.
US3753658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon black apparatus
Assignee: Phillips Petroleum Co
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Filing: 1971-03-15
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Granted: 1973-08-21
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Expires: 1991-03-15
Abstract
Abstract A carbon black reactor which comprises an axial zone, a combustion zone and a carbon black producing zone in contiguous alignment, said axial zone having choke means slidably positionable therein, said choke means having an axial passageway therethrough, and at least one aperture providing open communication between the downstream end of said choke and the upstream end of said choke.
Inventors
- 👤 E Henderson
- 👤 G Forseth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:20
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; C01; C01P; C01P2006/00; C01P2006/12; C01P2006/19
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
19 words
The carbon black reactor of claim 1 in which said cone is supported on said feed introduction conduit means.
Claim 2
Dependent Claim
26 words
The carbon black reactor of claim 1 in which said choke is adapted with a plurality of passageways peripheral to the centrally-positioned bore of said choke.
Claim 3
Dependent Claim
22 words
The carbon black reactor of claim 3 in which said plurality of passageways are positioned parallel to said bore of said choke.
Claim 4
Dependent Claim
22 words
The carbon black reactor of claim 2 in which said choke has a length of about one-half the length of said cone.
Claim 5
Dependent Claim
22 words
The carbon black reactor of claim 2 in which said choke has a length about equal to the length of said cone.
Claim 6
Dependent Claim
30 words
The carbon black reactor of claim 4 in which said choke has a length within the range of from about 0.5 to about 1 times the length of said cone.
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |