Patent US2789085A successfully refreshed from Google Patents.
US2789085A
Expired / Lapsed
US
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Preparation and desulfurization of petroleum coke
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1954-07-14
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Granted: 1957-04-16
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Expires: 1974-07-14
Abstract
No abstract record available.
Inventors
- 👤 Walter F Rollman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:53
CPC Classifications
C; C10; C10B; C10B55/00; C10B55/02; C10B55/04; C10L; C10L9/00; C10L9/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A METHOD OF PREPARING PETROLEUM COKE OF LOW SULFUR CONTENT WHICH COMPRISES THE STEPS OF MAINTAINING A BED OF COKE PARTICLES OF LOW SULFUR CONTENT AT A TEMPERATURE OF ABOUT 900* TO 1100*F. IN A COKING ZONE; DISCHARGING A LIQUID, HEAVY PETROLEUM OIL COKING CHARGE STOCK, PREHEATED TO A TEMPERATURE NOT ABOVE ITS CRACKING TEMPERATURE AND HAVING A HIGH CONCENTRATION OF SULFUR ONTO SUCH COKE PARTICLES WHEREBY THE OIL IS CONVERTED TO PRODUCT VAPORS AND THIN LAYERS OF SULFUR-CONTAINING GREEN COKE ADRE DEPOSITED ON THE SURFACE OF THE COKE PARTICLES; HEATING THE COKE PARTICLES CARRYING SAID DEPOSIT OF GREEN COKE THEREON TO A TEMPERATURE IN THE RANGE OF 2500* TO 3200*F., MAINTAINING THE COKE PARTICLES AT TEMPERATURES
Claim 2
Independent Claim
117 words
A METHOD OF PREPARING PETROLEUM COKE OF LOW SULFUR CONTENT WHICH COMPRISES THE STEPS OF MAINTAINING A BED OF COKE PARTICLES OF LOW SULFUR CONTENT AT A TEMPERATURE OF ABOUT 900* TO 1100*F. IN A COKING ZONE; DISCHARGING A LIQUID, HEAVY PETROLEUM OIL COKING CHARGE STOCK, PREHEATED TO A TEMPERATURE NOT ABOVE ITS CRACKING TEMPERATURE AND HAVING A HIGH CONCENTRATION OF SULFUR ONTO SUCH COKE PARTICLES WHEREBY THE OIL IS CONVERTED TO PRODUCT VAPORS AND THIN LAYERS OF SULFUR-CONTAINING GREEN COKE ADRE DEPOSITED ON THE SURFACE OF THE COKE PARTICLES; HEATING THE COKE PARTICLES CARRYING SAID DEPOSIT OF GREEN COKE THEREON TO A TEMPERATURE IN THE RANGE OF 2500* TO 3200*F., MAINTAINING THE COKE PARTICLES AT TEMPERATURES
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) | 1960-04-15 | 1960-10-15 | 1961-04-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-15 | 1964-10-15 | 1965-04-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-15 | 1968-10-15 | 1969-04-16 | $7700.00 | Window Closed / Lapsed |