US2518211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carbon black
Assignee: Columbian Carbon Co
•
Filing: 1946-01-28
•
Granted: 1950-08-08
•
Expires: 1966-01-28
Abstract
No abstract record available.
Inventors
- 👤 Wiegand William Bryan
- 👤 Sweitzer Carl William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:15
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/58; C01; C01P; C01P2006/00; C01P2006/10; C01P2006/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
IN THE BEADING OF CARBON BLACK OF THE FURNACE TYPE, THE STEP OF SUBJECTING THE BLACK TO A PRELIMINARY TREATMENT WHICH COMPRISES UNIFORMLY WETTING THE BLACK WITH WATER IN PROPORTIONS WITHIN THE RANGE OF FROM ONE-HALF TO ONE AND ONEHALF TIMES THE DRY WEIGHT OF THE BLACK AND SUCH AS TO PRODUCE A MOIST LOAMY MASS OF SUCH CONSISTENCY THAT IT WILL NOT FLOW UNDER ITS OWN WEIGHT BUT WILL COHERE WHEN PRESSED, SUBJECTING THIS MIXTURE OF BLACK AND WATER TO SHEARING FORCES UNDER PRESSURE CREATED BY CONTINUOUS GRINDING CONTACT OF EXTENDED SURFACES TO PRODUCE A CRUMBLY MASS, THE SUBJECTION OF THE MIXTURE OF BLACK AND WATER TO THE COMPRESSIBILITY OF DRIED BEADS MADE THEREFROM IS LESS THAN 30% BY THE TEST SET FORTH IN THE SPECIFICATION AND THEREAFTER SUBJECTING THE CARBON BLACK TO THE BEADING OPERATION.
Claim 2
Dependent Claim
137 words
IN THE BEADING OF CARBON BLACK OF THE FURNACE TYPE, THE STEP OF SUBJECTING THE BLACK TO A PRELIMINARY TREATMENT WHICH COMPRISES UNIFORMLY WETTING THE BLACK WITH WATER IN PROPORTIONS WITHIN THE RANGE OF FROM ONE-HALF TO ONE AND ONEHALF TIMES THE DRY WEIGHT OF THE BLACK AND SUCH AS TO PRODUCE A MOIST LOAMY MASS OF SUCH CONSISTENCY THAT IT WILL NOT FLOW UNDER ITS OWN WEIGHT BUT WILL COHERE WHEN PRESSED, SUBJECTING THIS MIXTURE OF BLACK AND WATER TO SHEARING FORCES UNDER PRESSURE CREATED BY CONTINUOUS GRINDING CONTACT OF EXTENDED SURFACES TO PRODUCE A CRUMBLY MASS, THE SUBJECTION OF THE MIXTURE OF BLACK AND WATER TO THE COMPRESSIBILITY OF DRIED BEADS MADE THEREFROM IS LESS THAN 30% BY THE TEST SET FORTH IN THE SPECIFICATION AND THEREAFTER SUBJECTING THE CARBON BLACK TO THE BEADING OPERATION.
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) | 1953-08-07 | 1954-02-06 | 1954-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-07 | 1958-02-06 | 1958-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-07 | 1962-02-06 | 1962-08-08 | $7700.00 | Window Closed / Lapsed |