US2618533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of carbon black
Assignee: Union Oil Company of California
•
Filing: 1948-07-22
•
Granted: 1952-11-18
•
Expires: 1968-07-22
Abstract
No abstract record available.
Inventors
- 👤 John L Bills
- 👤 Art C Mckinnis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:22
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/50; C09C1/487
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
IN A PROCESS FOR THE MANUFACTURE OF CARBON BLACK, THE STEPS WHICH COMPRISE FORMING A COMBUSTIBLE GASEOUS MIXTURE OF A NORMALLY GASEOUS HYDROCARBON AND AN AMOUNT OF OXYGEN LESS THAN THAT REQUIRED FOR COMBUSTION OF SAID HYDROCARBON TO CARBON AND WATER, PASSING SAID MIXTURE THROUGH A POROUS WALL, BURNING SAID MIXTURE IN AN ENCLOSED FREE SPACE WHILE PASSING OXYGEN DIRECTLY INTO THE FLAME IN A DIRECTION COUNTERCURRENT TO THE BURNING GAS MIXTURE AND IN AN AMOUNT REPRESENTING BETWEEN ABOUT 5 AND ABOUT 50 PER CENT BY VOLUME OF THE AMOUNT REQUIRED FOR THE COMBUSTION OF THE HYDROCARBON TO CARBON DIOXIDE AND WATER, AND THERE AFTER RECOVERING CARBON BLACK FROM THE PRODUCTS OF THE COMBUSTION, THE TOTAL AMOUNT OF OXYGEN EMPLOYED BEING LESS THAN THAT REQUIRED FOR COMBUSTION OF THE HYDROCARBON TO -CARBON DIOXIDE AND WATER.
Claim 2
Dependent Claim
135 words
IN A PROCESS FOR THE MANUFACTURE OF CARBON BLACK, THE STEPS WHICH COMPRISE FORMING A COMBUSTIBLE GASEOUS MIXTURE OF A NORMALLY GASEOUS HYDROCARBON AND AN AMOUNT OF OXYGEN LESS THAN THAT REQUIRED FOR COMBUSTION OF SAID HYDROCARBON TO CARBON AND WATER, PASSING SAID MIXTURE THROUGH A POROUS WALL, BURNING SAID MIXTURE IN AN ENCLOSED FREE SPACE WHILE PASSING OXYGEN DIRECTLY INTO THE FLAME IN A DIRECTION COUNTERCURRENT TO THE BURNING GAS MIXTURE AND IN AN AMOUNT REPRESENTING BETWEEN ABOUT 5 AND ABOUT 50 PER CENT BY VOLUME OF THE AMOUNT REQUIRED FOR THE COMBUSTION OF THE HYDROCARBON TO CARBON DIOXIDE AND WATER, AND THERE AFTER RECOVERING CARBON BLACK FROM THE PRODUCTS OF THE COMBUSTION, THE TOTAL AMOUNT OF OXYGEN EMPLOYED BEING LESS THAN THAT REQUIRED FOR COMBUSTION OF THE HYDROCARBON TO -CARBON DIOXIDE AND WATER.
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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) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |