Patents by Inventor Bruce P. Johnson

Bruce P. Johnson 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 the preparation of benzhydrocodone hydrochloride
    Patent number: 10406153
    Abstract: The invention is directed to processes for the preparation of benzhydrocodone hydrochloride. More particularly, the invention is directed to processes for a one-pot synthesis of benzhydrocodone hydrochloride of improved yield and/or purity.
    Type: Grant
    Filed: August 31, 2017
    Date of Patent: September 10, 2019
    Assignee: Noramco, Inc.
    Inventors: Wen-Chun Zhang, Bruce P. Johnson
  • PROCESS FOR THE PREPARATION OF BENZHYDROCODONE HYDROCHLORIDE
    Publication number: 20180055836
    Abstract: The invention is directed to processes for the preparation of benzhydrocodone hydrochloride. More particularly, the invention is directed to processes for a one-pot synthesis of benzhydrocodone hydrochloride of improved yield and/or purity.
    Type: Application
    Filed: August 31, 2017
    Publication date: March 1, 2018
    Applicant: Noramco, Inc.
    Inventors: Wen-Chun ZHANG, Bruce P. JOHNSON
  • Process for predicting the useful life of a respirator cartridge
    Patent number: 4237726
    Abstract: A process for predicting the useful life of a respirator cartridge when used in an environment in which a specified toxic or hazardous organic vapor is present by measuring the weight increase of a preselected sorptive agent in a preselected geometrical configuration when exposed to a constant flow rate of a mixture of known concentration, said mixture consisting of dry air having the toxic or hazardous organic vapor dispersed therein. The invention also includes a kit consisting of some or all of the apparatus or equipment essential for practicing the present invention.
    Type: Grant
    Filed: August 1, 1979
    Date of Patent: December 9, 1980
    Assignee: The Dow Chemical Company
    Inventors: Robert L. Peterson, Gerald P. Beaumont, Bruce P. Johnson