US3392140A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the production of homogeneous rubber-silica mixtures
Assignee: Huels AG
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Filing: 1962-10-18
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Granted: 1968-07-09
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Expires: 1982-10-18
Abstract
No abstract record available.
Inventors
- 👤 Maahs Gunther
- 👤 Berg Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:13
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/215; C08L; C08L21/00; C08J2321/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
PROCESS FOR THE PRODUCTION OF A HOMOGENEOUS RUBBER-SILICA MIXTURE WHICH COMPRISES MIXING A SYNTHETIC RUBBER LATEX SELECTED FROM THE GROUP CONSISTING OF POLYMERS AND COPOLYMERS OF UNSATURATED COMPOUNDS THAT ARE FREE OF BASIC NITROGEN FUNCTIONAL GROUPS, SAID LATEX CONTAINING A CATION-ACTIVE EMULSIFIER SELECTED FROM THE GROUP CONSISTING OF QUATERNARY NITROGENEOUS ORGANIC SALTS, WITH AN ALKALI METAL SILICATE SOLUTION AND PRECIPITATING THE RESULTING MIXTURE BY THE ADDITION OF A COAGULANT SELECTED FROM THE GROUP CONSISTING OF ACIDS AND NEUTRAL ELECTROLYTES.
Claim 2
Dependent Claim
79 words
PROCESS FOR THE PRODUCTION OF A HOMOGENEOUS RUBBER-SILICA MIXTURE WHICH COMPRISES MIXING A SYNTHETIC RUBBER LATEX SELECTED FROM THE GROUP CONSISTING OF POLYMERS AND COPOLYMERS OF UNSATURATED COMPOUNDS THAT ARE FREE OF BASIC NITROGEN FUNCTIONAL GROUPS, SAID LATEX CONTAINING A CATION-ACTIVE EMULSIFIER SELECTED FROM THE GROUP CONSISTING OF QUATERNARY NITROGENEOUS ORGANIC SALTS, WITH AN ALKALI METAL SILICATE SOLUTION AND PRECIPITATING THE RESULTING MIXTURE BY THE ADDITION OF A COAGULANT SELECTED FROM THE GROUP CONSISTING OF ACIDS AND NEUTRAL ELECTROLYTES.
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) | 1971-07-09 | 1972-01-08 | 1972-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-09 | 1976-01-08 | 1976-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-09 | 1980-01-08 | 1980-07-09 | $7700.00 | Window Closed / Lapsed |