Patents by Inventor Charles S. Spanjers

Charles S. Spanjers 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).

  • Forming dienes from cyclic ethers and diols, including tetrahydrofuran and 2-methyl-1,4-butanediol
    Patent number: 10919030
    Abstract: Forming a diene includes contacting a reactant including at least one of a cyclic ether and a diol with a heterogeneous acid catalyst to yield a reaction mixture including a diene. The heterogeneous acid catalyst includes at least one of a Lewis acid catalyst, a supported Lewis-acid catalyst, a Brnsted acid catalyst, a solid acid catalyst, a supported phosphoric acid catalyst, and a sulfonated catalyst. The dehydration of cyclic ethers and diols with high selectivity to yield dienes completes pathways for the production of dienes, such as isoprene and butadiene, from biomass in high yields, thereby promoting economical production of dienes from renewable resources.
    Type: Grant
    Filed: September 29, 2017
    Date of Patent: February 16, 2021
    Assignee: Regents of the University of Minnesota
    Inventors: Omar A. Abdelrahman, Charles S. Spanjers, Dae Sung Park, Michael Tsapatsis, Limin Ren, Paul J. Dauenhauer
  • Article having braided fiber and rod end connection
    Patent number: 10661598
    Abstract: An article includes having a braided fiber having a first end and a second end, and a rod having a first end and a second end, whereby the first end of the rod is threaded and wherein the second end of the rod is disposed inside the first end of the braided fiber.
    Type: Grant
    Filed: December 7, 2018
    Date of Patent: May 26, 2020
    Assignee: BERD, L.L.C.
    Inventors: Charles S. Spanjers, Kyle D. Olson
  • FORMING DIENES FROM CYCLIC ETHERS AND DIOLS, INCLUDING TETRAHYDROFURAN AND 2-METHYL-1,4-BUTANEDIOL
    Publication number: 20190345078
    Abstract: Forming a diene includes contacting a reactant including at least one of a cyclic ether and a diol with a heterogeneous acid catalyst to yield a reaction mixture including a diene. The heterogeneous acid catalyst includes at least one of a Lewis acid catalyst, a supported Lewis-acid catalyst, a Brnsted acid catalyst, a solid acid catalyst, a supported phosphoric acid catalyst, and a sulfonated catalyst. The dehydration of cyclic ethers and diols with high selectivity to yield dienes completes pathways for the production of dienes, such as isoprene and butadiene, from biomass in high yields, thereby promoting economical production of dienes from renewable resources.
    Type: Application
    Filed: September 29, 2017
    Publication date: November 14, 2019
    Inventors: Omar A. Abdelrahman, Charles S. Spanjers, Dae Sung Park, Michael Tsapatsis, Limin Ren, Paul J. Dauenhauer
  • ARTICLE HAVING BRAIDED FIBER AND ROD END CONNECTION
    Publication number: 20190143744
    Abstract: An article includes having a braided fiber having a first end and a second end, and a rod having a first end and a second end, whereby the first end of the rod is threaded and wherein the second end of the rod is disposed inside the first end of the braided fiber.
    Type: Application
    Filed: December 7, 2018
    Publication date: May 16, 2019
    Inventors: Charles S. Spanjers, Kyle D. Olson
  • Spoke composed of braided fiber with hub and rim terminations
    Patent number: 10150332
    Abstract: A spoke for use in connection with a wheel, the spoke having a braided fiber having a first end and a second end, a rod having a first end and a second end, whereby the first end of the rod is threaded and wherein the second end of the rod is disposed inside the first end of the braided fiber.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: December 11, 2018
    Assignee: BERD L.L.C.
    Inventors: Charles S. Spanjers, Kyle D. Olson
  • SPOKE COMPOSED OF BRAIDED FIBER WITH HUB AND RIM TERMINATIONS
    Publication number: 20160332481
    Abstract: A spoke for use in connection with a wheel, the spoke having a braided fiber having a first end and a second end, a rod having a first end and a second end, whereby the first end of the rod is threaded and wherein the second end of the rod is disposed inside the first end of the braided fiber.
    Type: Application
    Filed: May 5, 2016
    Publication date: November 17, 2016
    Inventors: Charles S. Spanjers, Kyle D. Olson