Patent US3885983A successfully refreshed from Google Patents.
US3885983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preparing carbonaceous pastes
Assignee: Rio Tinto France SAS
•
Filing: 1972-09-27
•
Granted: 1975-05-27
•
Expires: 1992-09-27
Abstract
Abstract Method and apparatus for the preparation of carbonaceous pastes intended primarily for use in the manufacture of electrodes wherein the prime materials, which may be formed of coke and tar, are mixed and heated and heated and then followed by water cooling to a temperature above 100*C by introducing the water in atomized form into an enclosure through which the pasty composition is allowed to pass as small fragments.
Inventors
- 👤 Roger Bulit
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:27
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/515; C04B35/52; C04B35/528; C04B35/532; C01; C01B; C01B32/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
131 words
A METHOD OF PREPARING, IN PARTICULATE FORM, A CARBONACEOUS PASTE CONSISTING ESSENTIALLY OF CARBON IN ADMIXTURE WITH A CARBONACEOUS BINDER CAPABLE OF BEING FLUIDIZED BY HEAT, FOR USE OF THE CARBONACEOUS PASTE PARTICULARLY IN THE MANUFACTURE OF ELECTRODES, COMPRISING THE STEPS OF HEATING THE CARBONACEOUS PASTE TO A PASTY STATE AT A TEMPERATURE CONSIDERABLY ABOVE 100*C, INTRODUCING SAID HEATED CARBONACEOUS PASTE INTO A CLOSED SPACE AND SPRAYING WATER IN ATOMIZED FROM INTO CONTACT WITH THE CARBONACEOUS MATERIAL AS IT PASSES THROUGH THE ENCLOSED SPACE WHEREBY THE DROPLETS OF WATER VAPORIZE UPON CONTACT WITH THE HEATED CARBONACEOUS MATERIAL TO BREAK UP THE CARBONACEOUS MATERIAL INTO SMALL AND RELATIVELY DRY FRAGMENTS WHILE SIMULTANEOUSLY COOLING THE FRAGMENTS OF CARBONACEOUS MATERIAL, AND COLLECTING THE COOLED FRAGMENTS OF CARBONACEOUS MATERIAL FOR REMOVAL FROM THE ENCLOSED SPACE.
Claim 2
Independent Claim
131 words
A METHOD OF PREPARING, IN PARTICULATE FORM, A CARBONACEOUS PASTE CONSISTING ESSENTIALLY OF CARBON IN ADMIXTURE WITH A CARBONACEOUS BINDER CAPABLE OF BEING FLUIDIZED BY HEAT, FOR USE OF THE CARBONACEOUS PASTE PARTICULARLY IN THE MANUFACTURE OF ELECTRODES, COMPRISING THE STEPS OF HEATING THE CARBONACEOUS PASTE TO A PASTY STATE AT A TEMPERATURE CONSIDERABLY ABOVE 100*C, INTRODUCING SAID HEATED CARBONACEOUS PASTE INTO A CLOSED SPACE AND SPRAYING WATER IN ATOMIZED FROM INTO CONTACT WITH THE CARBONACEOUS MATERIAL AS IT PASSES THROUGH THE ENCLOSED SPACE WHEREBY THE DROPLETS OF WATER VAPORIZE UPON CONTACT WITH THE HEATED CARBONACEOUS MATERIAL TO BREAK UP THE CARBONACEOUS MATERIAL INTO SMALL AND RELATIVELY DRY FRAGMENTS WHILE SIMULTANEOUSLY COOLING THE FRAGMENTS OF CARBONACEOUS MATERIAL, AND COLLECTING THE COOLED FRAGMENTS OF CARBONACEOUS MATERIAL FOR REMOVAL FROM THE ENCLOSED SPACE.
Claim 3
Dependent Claim
24 words
The method as claimed in claim 1 in which the carbonaceous binder is selected from the group consisting of oil tar and petroleum tar.
Claim 4
Dependent Claim
24 words
The method as claimed in claim 1 in which the carbonaceous material is heated to a temperature within the range of 150* to 170*C.
Claim 5
Dependent Claim
32 words
The method as claimed in claim 1 in which the fragments of carbonaceous material are cooled to a temperature which is still above 100*C to effect removal by vaporization of residual water.
Claim 6
Dependent Claim
13 words
The method as claimed in claim 1 in which the carbon is coke.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |