Patents by Inventor Jan E. Stamhuis

Jan E. Stamhuis has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Elastomeric compositions, process for the preparation thereof and tires containing them
    Patent number: 5064905
    Abstract: The present invention relates to an elastomeric composition suitable for tire treads comprising 1) 10-90% wt of a copolymr of a mono-aromatic vinyl compound and a conjugated diene having a vinyl content of .gtoreq.50% wt and a Tg >-35 degree C, and 2) 90-10% wt of a homopolymer of a conjugated diene or a copolymer of a mono-aromatic vinyl compound and a conjugated diene, containing <25% wt of mono-aromatic vinyl compound and having a vinyl content <25% wt and a Tg <-55 degree C, both polymers having a differential content of mono-aromatic vinyl compound which is <5 percentage points.
    Type: Grant
    Filed: January 31, 1991
    Date of Patent: November 12, 1991
    Assignee: Shell Oil Company
    Inventors: Jan E. Stamhuis, Antonius A. Broekhuis, Pieter Luijk
  • Elastomeric compositions, process for the preparation thereof and tires containing them
    Patent number: 5036138
    Abstract: The present invention relates to an elastomeric composition suitable for tire treads comprising (1) 10-90% wt of a copolymer of a mono-aromatic vinyl compound and having a vinyl content of <50% wt and a Tg<-35 degree C., and (2) 90-10% wt of a hompolymer of a conjugated diene or a copolymer of a mono-aromatic vinyl compound and a conjugated diene, containing <25% wt of mono-aromatic vinyl compound and having a vinyl content <25% wt and a Tg<-55 degree C., both polymer having a differential content of mono-aromatic vinyl compound which is <5 percentage points.
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: July 30, 1991
    Assignee: Shell Oil Company
    Inventors: Jan E. Stamhuis, Antonius A. Broekhuis, Pieter Luijk
  • Elastomers and tires containing them
    Patent number: 4940756
    Abstract: An elastomeric composition suitable for tires comprising(A) 5 to 50% by weight of copolymer block (A) of an aromatic vinyl compound and a conjugated diene and containing 52-90% wt of vinyl compound and having an average mol. wt. >20,000 and a vinyl content in the diene units of <20% wt, and(B) 95-50% by weight of a block (B) which is a homopolymer of a conjugated diene or a copolymer block of an aromatic vinyl compound and a conjugated diene, block (B) containing <20% wt. of aromatic vinyl compound and having a Tg <-40.degree..degree.C.,after vulcanization blocks (A) and (B) being incompatible.
    Type: Grant
    Filed: January 20, 1989
    Date of Patent: July 10, 1990
    Assignee: Shell Oil Company
    Inventors: Antonius A. Broekhuis, Pieter Luijk, Jan E. Stamhuis