US2908586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Beaded carbon black
Assignee: Columbian Carbon Co
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Filing: 1957-02-06
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Granted: 1959-10-13
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Expires: 1977-02-06
Abstract
No abstract record available.
Inventors
- 👤 Harold A Braendle
- 👤 George L Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:09
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C09C1/56; C09C1/58; C01; C01P; C01P2006/00; C01P2006/10; C01P2006/19; C01P2006/21
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
77 words
IN THE PROCESS OF BEADING CARBON BLACK IN WHICH PREFORMED DRY-PROCESS BEADS ARE PARTIALLY WETTED WITH WATER AND THE BEADS THEREAFTER DRIED, THE STEPS OF MIXING WITH THE WATER, PRIOR TO WETTING THE BEADS THEREWITH, A MINOR PROPORTION OF AN AQUEOUS EMULSION OF ROSIN IN WHICH THE EMULSIFYING AGENT IS AMMONIUM ROSIN SOAP AND DECOMPOSING THE SOAP AND THEREBY PRECIPITATING THE ROSIN ON THE CARBON BLACK BY DRYING THE BEADS AT A TEMPERATURE IN EXCESS OF 250*F.
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) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |