Patents by Inventor William R. Dolbier, Jr.

William R. Dolbier, Jr. 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).

  • Process for preparation of TFPX-dichloride
    Patent number: 6150499
    Abstract: A method for the synthesis of TFPX-dichloride is disclosed. The method involves reacting hexachloro-p-xylene with anhydrous HF in an inert organic solvent. The reaction is advantageous in that it produces relatively high yields of TFPX-dichloride, provides little waste, and is carried out as a simple, one-step process.
    Type: Grant
    Filed: January 6, 1998
    Date of Patent: November 21, 2000
    Assignee: Specialty Coating Systems, Inc.
    Inventors: William R. Dolbier, Jr., Jianxin Duan
  • Process for the preparation of octafluoro-(2,2) paracyclophane
    Patent number: 5849962
    Abstract: A process for the preparation of octafluoro-?2,2!paracyclophane includes contacting a reactant selected from the group consisting of 1,4-bis(bromodifluoromethyl)benzene (dibromide), 1,4-bis(chlorodifluoromethyl)benzene (dichloride), and 1,4-bis(iododifluoromethyl)benzene (diiodide) with trimethylsilyltributyltin (TMSTBT) (a reducing agent) and fluoride ions in a refluxing solution of hexamethylphosphoramide (HMPA) or dimethylsulfoxide (DMSO) in tetrahydrofuran (THF) at conditions effective to promote a reaction product comprising octafluoro-?2,2!paracyclophane.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: December 15, 1998
    Assignee: Specialty Coating Systems, Inc.
    Inventors: William R. Dolbier, Jr., Xiao X. Rong
  • Parylene AF4 synthesis
    Patent number: 5841005
    Abstract: Methods of making parylene AF4 using novel that result in reduced cost. Low dilution technology may used to provide parylene AF4 in substantially improved yields. The relative amount of transition metal catalyst can be decreased. The amount of undesired byproduct is also reduced.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: November 24, 1998
    Inventors: William R. Dolbier, Jr., Jian-Xin Duan, Alex J. Roche
  • Processes for the preparation of octafluoro-[2,2]paracyclophane
    Patent number: 5536892
    Abstract: A process for the preparation of octafluoro-[2,2]paracyclophane includes contacting a reactant selected from the group consisting of 1,4-bis (bromodifluoromethyl)benzene (dibromide), 1,4-bis (chlorodifluoromethyl)benzene (dichloride), and 1,4-bis (iododifluoromethyl)benzene (diiodide) with trimethylsilyltributyltin (TMSTBT) (a reducing agent) and fluoride ions in a refluxing solution of hexamethylphosphoramide (HMPA) or dimethylsulfoxide (DMSO) in tetrahydrofuran (THF) at conditions effective to promote a reaction product comprising octafluoro-[2,2]paracyclophane.
    Type: Grant
    Filed: October 18, 1995
    Date of Patent: July 16, 1996
    Assignee: Specialty Coating Systems, Inc.
    Inventors: William R. Dolbier, Jr., Xiao X. Rong
  • Processes for the preparation of octafluoro-[2,2]paracyclophane
    Patent number: 5210341
    Abstract: Processes are disclosed for the preparation of octafluoro-[2,2]paracyclophane which utilize a low temperature, e.g., less than about 200.degree. C., and a reducing agent comprising titanium to promote the dimerization of dihalo-tetrafluoro-p-xylenes. One suitable reducing agent is prepared by combining TiCl.sub.4 with LiAlH.sub.4 in an organic solvent.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: May 11, 1993
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: William R. Dolbier, Jr., M. A. Asghar, He-Qi Pan