US2839825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon black producing furnace and method of construction
Assignee: Phillips Petroleum Co
•
Filing: 1954-04-08
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Granted: 1958-06-24
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Expires: 1974-04-08
Abstract
No abstract record available.
Inventors
- 👤 Jr Clyde H Edwards
- 👤 Jr Travis S Whitsel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:36
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49879; Y10T29/4998
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
THE METHOD OF CONSTRUCTING A CARBON BLACK PRODUCING FURNACE HAVING AN ELONGATED CYLINDRICAL PASSAGE SURROUNDED BY A QUANTITY OF REFRACTORY MATERIAL WHICH COMPRISES, IN COMBINATION, THE STEPS OF INITIALLY SECURING A FIRST CYLINDRICAL FLANGE TO A LOWER BASE ASSEMBLY; MOUNTING IN AN UPRIGHT MANNER A CYLINDRICAL HOLLOW METAL SHELL ON SAID BASE ASSEMBLY INSIDE FIRST FLANGE; MOUNTING AXIAL EXPANDABLE GUIDE MEANS WITHIN SAID SHELL UPON SAID LOWER BASE ASSEMBLY AND SECURING SAME THERETO IN ITS EXPANDED POSITION; SECURING A SECOND CYLINDRICAL FLANGE TO AN UPPER BASE ASEMBLY AND MOUNTING THE COMBINATION UPON SAID SHELL; WELDING SAID FIRST AND SECOND FLANGES TO SAID SHELL; MOUNATING PLURAL CYLINDRICAL LAYERS OF PRECAST REFRACTORY SECTIONS UPON SAID LOWER BASE ASSEMBLY IN SPACED RELATION WITH THE INNER WALL OF SAID SHELL; CENTERING SAID SECTIONS BY SAID GUIDE MEANS, THE LATTER ADAPTED TO MAINTAIN SAID SECTIONS IN AN UPRIGHT CYLIN-
Claim 2
Independent Claim
144 words
THE METHOD OF CONSTRUCTING A CARBON BLACK PRODUCING FURNACE HAVING AN ELONGATED CYLINDRICAL PASSAGE SURROUNDED BY A QUANTITY OF REFRACTORY MATERIAL WHICH COMPRISES, IN COMBINATION, THE STEPS OF INITIALLY SECURING A FIRST CYLINDRICAL FLANGE TO A LOWER BASE ASSEMBLY; MOUNTING IN AN UPRIGHT MANNER A CYLINDRICAL HOLLOW METAL SHELL ON SAID BASE ASSEMBLY INSIDE FIRST FLANGE; MOUNTING AXIAL EXPANDABLE GUIDE MEANS WITHIN SAID SHELL UPON SAID LOWER BASE ASSEMBLY AND SECURING SAME THERETO IN ITS EXPANDED POSITION; SECURING A SECOND CYLINDRICAL FLANGE TO AN UPPER BASE ASEMBLY AND MOUNTING THE COMBINATION UPON SAID SHELL; WELDING SAID FIRST AND SECOND FLANGES TO SAID SHELL; MOUNATING PLURAL CYLINDRICAL LAYERS OF PRECAST REFRACTORY SECTIONS UPON SAID LOWER BASE ASSEMBLY IN SPACED RELATION WITH THE INNER WALL OF SAID SHELL; CENTERING SAID SECTIONS BY SAID GUIDE MEANS, THE LATTER ADAPTED TO MAINTAIN SAID SECTIONS IN AN UPRIGHT CYLIN-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |