Patent US2500968A successfully refreshed from Google Patents.
US2500968A
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Carbon black process
Assignee: Columbian Carbon Co
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Filing: 1946-08-31
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Granted: 1950-03-21
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Expires: 1966-08-31
Abstract
No abstract record available.
Inventors
- 👤 Louis J Venuto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:31
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/58; C01; C01P; C01P2006/00; C01P2006/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
IN A PROCESS FOR CONVERTING FURNACE CARBON BLACK TO A PELLETED FORM BY AGITATING THE BLACK WITH A RESTRICTED AMOUNT OF WATER WITH AN AGITATOR HAVING SURFACES WHICH EXERT A SUFFICIENT COMPACTING ACTION ON THE CARBON BLACK PARTICLES TO FORM THEM INTO PELLETS HAVING DENSE, HARDENED SURFACES, THE IMPROVEMENT WHICH COMPRISES SUB JECTING THE CARBON BLACK TO A PRELIMINARY DENSING OPERATION BY AGITATING IT WITH AN AMOUNT OF WATER LESS THAN THAT REQUIRED FOR THE PELLETING WITH AN AGITATOR HAVING A LESSER COMPACTING SURFACE WHICH EXERTS AN INSUFFICIENT COMPACTING ACTION ON PARTICLES THEREOF TO FORM THEM INTO PELLETS HAVING DENSE, HARD SURFACES UNTIL THE CARBON BLACK HAS BEEN UNIFORMLY DAMPENED AND SUBSTANTIALLY REDUCED IN VOLUME.
Claim 2
Dependent Claim
115 words
IN A PROCESS FOR CONVERTING FURNACE CARBON BLACK TO A PELLETED FORM BY AGITATING THE BLACK WITH A RESTRICTED AMOUNT OF WATER WITH AN AGITATOR HAVING SURFACES WHICH EXERT A SUFFICIENT COMPACTING ACTION ON THE CARBON BLACK PARTICLES TO FORM THEM INTO PELLETS HAVING DENSE, HARDENED SURFACES, THE IMPROVEMENT WHICH COMPRISES SUB JECTING THE CARBON BLACK TO A PRELIMINARY DENSING OPERATION BY AGITATING IT WITH AN AMOUNT OF WATER LESS THAN THAT REQUIRED FOR THE PELLETING WITH AN AGITATOR HAVING A LESSER COMPACTING SURFACE WHICH EXERTS AN INSUFFICIENT COMPACTING ACTION ON PARTICLES THEREOF TO FORM THEM INTO PELLETS HAVING DENSE, HARD SURFACES UNTIL THE CARBON BLACK HAS BEEN UNIFORMLY DAMPENED AND SUBSTANTIALLY REDUCED IN VOLUME.
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) | 1953-03-20 | 1953-09-19 | 1954-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-20 | 1957-09-19 | 1958-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-20 | 1961-09-19 | 1962-03-21 | $7700.00 | Window Closed / Lapsed |