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US3687719A Expired / Lapsed US ⏱️ 0.0 years remaining

Method of improving adhesion of vulcanized active reenforcing filler containing rubber compositions to metals

Assignee: Evonik Operations GmbH
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Filing: 1967-07-05
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Granted: 1972-08-29
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Expires: 1987-07-05
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Abstract

Abstract METHOD OF IMPROVING THE ADHESION OF VULCANIZED RUBBER COMPOSITIONS TO METALS COMPRISING ADMIXING (1) ACTIVE REENFORCING EXTREMELY FINELY DIVIDED SILICAS AND/OR ALUMINUM SILICATE AND/OR CALCIUM SILICATED OR CALCIUM CARBONATE, IF DESIRED, BLENDED WITH CARBON BLACK, AND (2) COMPONENTS CAPABLE OF RESIN FORMATION WITH THE RUBBER COMPOSITION BEFORE IT IS VULCANIZED ON THE METAL. THE QUANTITY OF THE SILICAS OR SILICATES OR CALCIUM CARBONATE ALONE OR BLENDED WITH CARBON BLACK ADMIXED WITH THE RUBBER COMPOSITION IS 5 TO 100, PREFERABLY, 10 TO 50 PARTS BY WEIGHT PER 100 PARTS BY WEIGHT OF RUBBER. A FURTHER IMPROVEMENT IN THE BOND OBTAINED CAN BE ACHIEVED BY ADMIXTURE OF HEAVY METAL OXIDES WITH THE RUBBER COMPONENTS PRIOR TO THE VULCANIZATION.

Inventors

  • 👤 Erhard Klotzer
  • 👤 Johannes Pochert

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 20:56
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/04; C08J5/10; C08K; C08K3/00; C08K3/18; C08K3/24; C08K3/26; C08K3/34; C08J2321/00

Claims Analysis

Total Claims: 0
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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1975-08-29 1976-02-28 1976-08-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-08-29 1980-02-28 1980-08-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-08-29 1984-02-28 1984-08-29 $7700.00 Window Closed / Lapsed

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