Patents by Inventor Dale J. Wilpers

Dale J. Wilpers 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).

  • Patent number: 5359004
    Abstract: A method of producing a polyolefin blend, such as a polypropylene-polybutylene blend comprising preferentially cracking the polybutylene component with the aid of a cracking agent at a temperature sufficient to induce preferential cracking. The blend produced by the method of this invention has improved optical properties, shrinkage, and processability.
    Type: Grant
    Filed: September 2, 1993
    Date of Patent: October 25, 1994
    Assignee: Shell Oil Company
    Inventors: Dale J. Wilpers, Charles C. Hwo
  • Patent number: 4960617
    Abstract: The present invention includes a coated polyolefin particle and a method for post-reactor stabilization of polyolefins comprising:melting a polyolefin wax;blending at least one additive into the liquid polyolefin wax;fluidizing polyolefin particles to be stabilized with a hot gas;spraying the liquid polyolefin wax containing at least one additive on the fluidized polyolefin particles, and forming at least partially coated polymer particles;maintaining the at least partially coated polymer particles and fluidized polyolefin particles at a temperature which is sufficiently high to prevent the formation of fibers from the wax and which enhances the formation of stabilized polymer particles.
    Type: Grant
    Filed: April 3, 1989
    Date of Patent: October 2, 1990
    Assignee: Shell Oil Company
    Inventors: Ananda M. Chatterjee, Dale J. Wilpers
  • Patent number: 4298540
    Abstract: A simplified, energy efficient process for regulating the composition of recycle solvent obtained by the phase separation of the extract of oilseed extraction with an isopropanol-based solvent. In the extraction of oilseeds with such a solvent, there is obtained, by cooling of the extract, a solvent-rich liquid phase. The invention provides for regulation of the composition of this phase for purposes of solvent recycle by a process which comprises steps for dividing the phase into a first fraction (between about 60 and 95 percent) and a second fraction (between about 5 and 40 percent), directly recycling the first fraction as solvent for further extraction, distilling the second fraction to recover an overhead vapor-consisting essentially of a constant boiling mixture of isopropyl alcohol and water and a bottoms liquid, and condensing and recycling said overhead as solvent for further extraction.
    Type: Grant
    Filed: December 15, 1980
    Date of Patent: November 3, 1981
    Assignee: Shell Oil Company
    Inventors: Kun C. Youn, Dale J. Wilpers
  • Patent number: H1419
    Abstract: It is herein provided a polymer composition having and exhibiting improved bonding to incompatible materials comprising functionalized high melt flow polyolefins and unfunctionalized polyolefins. More specifically, these compositions have and exhibit improved adhesion to polar materials, and improved dyeability and printability.
    Type: Grant
    Filed: October 16, 1992
    Date of Patent: February 7, 1995
    Assignee: Shell Oil Company
    Inventors: Dale J. Wilpers, Charles C. Hwo, Robert W. Lee, William H. Korcz, Simon Mostert
  • Patent number: H1583
    Abstract: It is herein disclosed a novel elastomeric polybutylene-1 having and exhibiting syndiotacticity of greater than ten percent, and possessing other desirable properties.The novel elastomeric polybutylene-1 can be blended with compatible materials such as polypropylene and its copolymers, ethylene-propylene block copolymers, butyl rubbers and polyisobutylene. Such compositions are particularly suitable in films, hot melt adhesives, textile and fiber applications.The novel elastomeric polybutylene-1 can also be blended with incompatible materials such as ethylenically unsaturated esters (EVA, EMA, EMAA, EEA), polyester, nylon, polystyrene, styrene block copolymers (SEBS, SIS, SBS) and polyethylenes into a composition having soft and improved elastic properties. Such blends are particularly useful in easy-open packaging and foam applications, and in PVC replacement. When oriented, films made of such blends are used as soft and elastic shrink films.
    Type: Grant
    Filed: June 1, 1993
    Date of Patent: August 6, 1996
    Assignee: Shell Oil Company
    Inventors: Charles C. Hwo, Dale J. Wilpers