Patent US2964490A successfully refreshed from Google Patents.
US2964490A
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Butadiene copolymer rubber-silica masterbatch and process of preparation
Assignee: Uniroyal Inc
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Filing: 1957-03-12
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Granted: 1960-12-13
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Expires: 1977-03-12
Abstract
No abstract record available.
Inventors
- 👤 Louis H Howland
- 👤 Woodrow W White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:47
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/20; C08J3/205; C08J3/21; C08J3/215; C08L; C08L21/00; C08J2309/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A PROCESS WHICH COMPRISES INCORPORATING AN ALKALIMETAL SILICATE IN A LATEX OF A RUBBER COPOLYMER OF A BUTADIENE-1,3 WITH AN UNSATURATED COMPOUND CONTAINING A BASIC NITROGEN FUNCTIONAL GROUP, AND COAGULATING SAID RUBBER AND FORMING A MASTERBATCH THEREWITH OF COPRECIPITATED SILICA IN THE FORM OF FILTERABLE CRUMBS BY MIXING AN ACID WITH SUCH LATEX CONTAINING THE ALKALI-METAL SILICATE TO PRODUCE A PH OF LESS THAN 7 IN THE AQUEOUS MEDIUM OF THE COAGULATED SYNTHETIC RUBBER AND COPRECIPITATED SILICA AT THE COMPLETION OF THE COAGULATION OF THE MASTERBATCH.
Claim 2
Dependent Claim
86 words
A PROCESS WHICH COMPRISES INCORPORATING AN ALKALIMETAL SILICATE IN A LATEX OF A RUBBER COPOLYMER OF A BUTADIENE-1,3 WITH AN UNSATURATED COMPOUND CONTAINING A BASIC NITROGEN FUNCTIONAL GROUP, AND COAGULATING SAID RUBBER AND FORMING A MASTERBATCH THEREWITH OF COPRECIPITATED SILICA IN THE FORM OF FILTERABLE CRUMBS BY MIXING AN ACID WITH SUCH LATEX CONTAINING THE ALKALI-METAL SILICATE TO PRODUCE A PH OF LESS THAN 7 IN THE AQUEOUS MEDIUM OF THE COAGULATED SYNTHETIC RUBBER AND COPRECIPITATED SILICA AT THE COMPLETION OF THE COAGULATION OF THE MASTERBATCH.
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) | 1963-12-13 | 1964-06-13 | 1964-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-13 | 1968-06-13 | 1968-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-13 | 1972-06-13 | 1972-12-13 | $7700.00 | Window Closed / Lapsed |