US2769795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of compounding carbon black and rubber
Assignee: Columbian Carbon Co
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Filing: 1956-02-01
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Granted: 1956-11-06
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Expires: 1976-02-01
Abstract
No abstract record available.
Inventors
- 👤 Harold A Braendle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:35
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/215; B; B29; B29B; B29B7/00; B29B7/30; B29B7/58; B29B7/60; B29B7/603; B29B7/74; B29B7/7476; B29B7/748; B29B7/7485; B29B7/7495; C08L; C08L21/00; C08J2321/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
IN THE PROCESS OF 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 STEPS OF CONTINUOUSLY MIXING THE CARBON BLACK IN A UNIFORM, PREDETERMINED PROPORTION WITH A FLOWING STREAM OF WATER UNDER CONDITIONS OF VIOLENT HYDRAULIC TURBULENCE AND IMPACT, AND THEREBY FORMING A CONTINUOUSLY FLOWING, CONFINED STREAM OF AN AQUEOUS CARBON BLACK SLURRY OF UNIFORM COMPOSITION, IMMEDIATELY, AND SUBSTANTIALLY INSTANTANEOUSLY, UNIFORMLY MIXING A STREAM OF THE LATEX IN UNIFORM, PREDETERMINED PROPORTIONS WITH THE RESULTANT STREAM OF SLURRY UNDER CONDITIONS OF VIOLENT HYDRAULIC TURBULENCE AND IMPACT AND, IMMEDIATELY FOLLOWING THE MIXING, COAGULATING THE RESULTANT MIXTURE BY ADDING A COAGULATING AGENT THERETO WITH AGITATION.
Claim 2
Dependent Claim
121 words
IN THE PROCESS OF 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 STEPS OF CONTINUOUSLY MIXING THE CARBON BLACK IN A UNIFORM, PREDETERMINED PROPORTION WITH A FLOWING STREAM OF WATER UNDER CONDITIONS OF VIOLENT HYDRAULIC TURBULENCE AND IMPACT, AND THEREBY FORMING A CONTINUOUSLY FLOWING, CONFINED STREAM OF AN AQUEOUS CARBON BLACK SLURRY OF UNIFORM COMPOSITION, IMMEDIATELY, AND SUBSTANTIALLY INSTANTANEOUSLY, UNIFORMLY MIXING A STREAM OF THE LATEX IN UNIFORM, PREDETERMINED PROPORTIONS WITH THE RESULTANT STREAM OF SLURRY UNDER CONDITIONS OF VIOLENT HYDRAULIC TURBULENCE AND IMPACT AND, IMMEDIATELY FOLLOWING THE MIXING, COAGULATING THE RESULTANT MIXTURE BY ADDING A COAGULATING AGENT THERETO WITH AGITATION.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |