Patent US3290791A successfully refreshed from Google Patents.
US3290791A
Expired / Lapsed
US
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Process and apparatus for improving quality of carbon black pellets
Assignee: Phillips Petroleum Co
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Filing: 1963-12-13
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Granted: 1966-12-13
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Expires: 1983-12-13
Abstract
No abstract record available.
Inventors
- 👤 Lawrence C Keaton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:37
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/58; C01; C01P; C01P2004/00; C01P2004/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A PROCESS COMPRISING THE STEPS OF (1) FEEDING WET CARBON BLACK PELLETS OF SIZES RANGING FROM SUBSTANTIALLY FINER THAN 8 MESH TO SUBSTANTIALLY COARSER THAN 8 TO A ROTARY DRYER; (2) HEATING SAID PELLETS IN SAID DRYER TO A TEMPERATURE IN THE RANGE OF 500* TO 600* F. SO AS TO SUBSTANTIALLY INCREASE THE PHOTELOMETER THEREOF; (3) PASSING DRIED PELLETS FROM SAID DRYER DIRECTLY TO A SEPARATE TRANSPORT AND COOLING ZNE LEADING TO A STORAGE ZONE AND COOLING SAID PELLETS TO A TEMPERATURE NOT IN EXCESS OF 300* F. THEREIN TO PERMIT SAFE STORAGE WHEN SAID PELLETS REACH THE END OF SAID TRANSPORT ZONE; (4) AND STORING THE PELLETS FROM STEP (3).
Claim 2
Dependent Claim
112 words
A PROCESS COMPRISING THE STEPS OF (1) FEEDING WET CARBON BLACK PELLETS OF SIZES RANGING FROM SUBSTANTIALLY FINER THAN 8 MESH TO SUBSTANTIALLY COARSER THAN 8 TO A ROTARY DRYER; (2) HEATING SAID PELLETS IN SAID DRYER TO A TEMPERATURE IN THE RANGE OF 500* TO 600* F. SO AS TO SUBSTANTIALLY INCREASE THE PHOTELOMETER THEREOF; (3) PASSING DRIED PELLETS FROM SAID DRYER DIRECTLY TO A SEPARATE TRANSPORT AND COOLING ZNE LEADING TO A STORAGE ZONE AND COOLING SAID PELLETS TO A TEMPERATURE NOT IN EXCESS OF 300* F. THEREIN TO PERMIT SAFE STORAGE WHEN SAID PELLETS REACH THE END OF SAID TRANSPORT ZONE; (4) AND STORING THE PELLETS FROM STEP (3).
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) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |