Patent US2980639A successfully refreshed from Google Patents.
US2980639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber compounding
Assignee: Columbian Carbon Co
•
Filing: 1957-05-29
•
Granted: 1961-04-18
•
Expires: 1977-05-29
Abstract
No abstract record available.
Inventors
- 👤 Harold A Braendle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:53
CPC Classifications
C; C08; C08L; C08L21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
IN THE PROCESS FOR PRODUCING DISPERSIONS OF CARBON BLACK IN RUBBER IN WHICH THE BLACK IS MIXED WITH THE RUBBER WHILE IN LATEX FORM AND THE CARBON BLACK-LATEX MIXTURE THEREAFTER COAGULATED, THE IMPROVEMENT COMPRISING THE FOLLOWING STEPS IN SEQUENCE, CONTINUOUSLY CHARGING THE CARBON BLACK AND WATER IN UNIFORM, PREDETERMINED PORTIONS TO A MIXING CHAMBER, SUBJECTING THE BLACKWATER MIXTURE IN THE CHAMBER TO VIOLENT HYDRAULIC AGITATION AND IMPACT AND THEREBY FORMING A CONTINUOUSLY FLOWING, CONFINED STREAM OF AQUEOUS CARBON BLACK SLURRY OF UNIFORM COMPOSITION, CONTINUOUSLY MIXING THE RESULTANT STREAM OF SLURRY, BEFORE ANY SEPARATION OR LOCALIZED CONCENTRATION OF THE CARBON BLACK CAN OCCUR THEREIN, IN UNIFORM PREDETERMINED PROPORTIONS, BY VIOLENT HYDRAULIC TURBULENCE AND IMPACT, WITH A STREAM OF A SYNTHETIC POLYMERIC DIOLEFIN RUBBER LATEX WHICH HAS BEEN PRODUCED BY EMULSION POLYMERIZATION USING A SOAP FROM THE GLASS CON-
Claim 2
Dependent Claim
137 words
IN THE PROCESS FOR PRODUCING DISPERSIONS OF CARBON BLACK IN RUBBER IN WHICH THE BLACK IS MIXED WITH THE RUBBER WHILE IN LATEX FORM AND THE CARBON BLACK-LATEX MIXTURE THEREAFTER COAGULATED, THE IMPROVEMENT COMPRISING THE FOLLOWING STEPS IN SEQUENCE, CONTINUOUSLY CHARGING THE CARBON BLACK AND WATER IN UNIFORM, PREDETERMINED PORTIONS TO A MIXING CHAMBER, SUBJECTING THE BLACKWATER MIXTURE IN THE CHAMBER TO VIOLENT HYDRAULIC AGITATION AND IMPACT AND THEREBY FORMING A CONTINUOUSLY FLOWING, CONFINED STREAM OF AQUEOUS CARBON BLACK SLURRY OF UNIFORM COMPOSITION, CONTINUOUSLY MIXING THE RESULTANT STREAM OF SLURRY, BEFORE ANY SEPARATION OR LOCALIZED CONCENTRATION OF THE CARBON BLACK CAN OCCUR THEREIN, IN UNIFORM PREDETERMINED PROPORTIONS, BY VIOLENT HYDRAULIC TURBULENCE AND IMPACT, WITH A STREAM OF A SYNTHETIC POLYMERIC DIOLEFIN RUBBER LATEX WHICH HAS BEEN PRODUCED BY EMULSION POLYMERIZATION USING A SOAP FROM THE GLASS CON-
References Cited (Backward Citations)
US1798253A
Cited
GB250623A
Cited
US1802761A
Cited
US2376281A
Cited
US2680111A
Cited
US2776953A
Cited
US2769795A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |