Patent DE630299C successfully refreshed from Google Patents.
US3429958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing carbon black-wax pellets
Assignee: Continental Carbon Co
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Filing: 1966-07-28
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Granted: 1969-02-25
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Expires: 1986-07-28
Abstract
No abstract record available.
Inventors
- 👤 R Jr Van Walcott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:00
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
59 words
A PROCESS FOR FORMING SMALL GENERALLY SPERICAL PELLETS OF A MIXTURE OF IMPALPABLE CARBON BLACK AND PARAFFIN WAX WHICH COMPRISES VIOLENTLY AGITATING THE CARBON BLACK IN AN ENCLOSED PIN-TYPE PELLETIZER WHILE INTRODUCING THEREINTO MOLTEN PARAFFIN WAX IN AN AMOUNT SUFFICIENT TO PROVIDE PELLETS HAVING A WEIGHT RATIO OF CARBON BLACK TO WAX OF FROM ABOUT 50:50 TO 30:70, RESPECTIVELY.
Claim 2
Dependent Claim
59 words
A PROCESS FOR FORMING SMALL GENERALLY SPERICAL PELLETS OF A MIXTURE OF IMPALPABLE CARBON BLACK AND PARAFFIN WAX WHICH COMPRISES VIOLENTLY AGITATING THE CARBON BLACK IN AN ENCLOSED PIN-TYPE PELLETIZER WHILE INTRODUCING THEREINTO MOLTEN PARAFFIN WAX IN AN AMOUNT SUFFICIENT TO PROVIDE PELLETS HAVING A WEIGHT RATIO OF CARBON BLACK TO WAX OF FROM ABOUT 50:50 TO 30:70, RESPECTIVELY.
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) | 1972-02-25 | 1972-08-26 | 1973-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-25 | 1976-08-26 | 1977-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-25 | 1980-08-26 | 1981-02-25 | $7700.00 | Window Closed / Lapsed |