The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 15, 2008
Filed:
Apr. 18, 2005
Philppe Laubry, Greer, SC (US);
Fanny Barbotin, Clermont-Ferrand, FR;
Philippe Johnson, Perignat-sur-Allier, FR;
Jean-luc Auger, Clermont-Ferrand, FR;
Philppe Laubry, Greer, SC (US);
Fanny Barbotin, Clermont-Ferrand, FR;
Philippe Johnson, Perignat-sur-Allier, FR;
Jean-Luc Auger, Clermont-Ferrand, FR;
Michelin Recherche et Technique S.A., Granges-Paccot, CH;
Abstract
Branched synthetic polyisoprenes are described having a macrostructure and a microstructure very similar to those of natural rubber. According to one aspect, these polyisoprenes have an apparent stress F/Sgreater than or equal to 0.4 MPa at a relative elongation α of 150%, applied to a dumbbell-shaped test specimen consisting of the crosslinkable polyisoprene. According to another aspect, these polyisoprenes fulfill the relationship:Cotan δ≧0.3761. η+0.15,:  (i)