Patents by Inventor Don R. Johnson

Don R. 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).

  • Patent number: 5362883
    Abstract: An improved process for the preparation of cyclic amino acids by a novel synthesis is described where a dinitrile derivative is converted in two steps to the desired products, as well as valuable intermediates used in the process.
    Type: Grant
    Filed: March 8, 1994
    Date of Patent: November 8, 1994
    Assignee: Warner-Lambert Company
    Inventors: Rex A. Jennings, Don R. Johnson, Ronald E. Seamans, James R. Zeller
  • Patent number: 5319135
    Abstract: An improved process for the preparation of cyclic amino acids by a novel synthesis is described where a dinitrile derivative is converted in two steps to the desired products, as well as valuable intermediates used in the process.
    Type: Grant
    Filed: June 4, 1993
    Date of Patent: June 7, 1994
    Assignee: Warner-Lambert Company
    Inventors: Rex A. Jennings, Don R. Johnson, Ronald E. Seamans, James R. Zeller
  • Patent number: 5132451
    Abstract: An improved process for the preparation of cyclic amino acids by a novel synthesis is described where a dinitrile derivative is converted in two steps to the desired products, as well as valuable intermediates used in the process.
    Type: Grant
    Filed: August 10, 1990
    Date of Patent: July 21, 1992
    Assignee: Warner-Lambert Company
    Inventors: Rex A. Jennings, Don R. Johnson, Ronald E. Seamans, James R. Zeller
  • Patent number: 4575373
    Abstract: A laser beam is utilized to alter, in situ, the power of an implanted intraocular lens. The overall intraocular lens can be of conventional size and shape. The circumference, or outer ring of the lens is manufactured from a non-toxic heat shrinkable plastic. The plastic is preferably colored to permit selective absorption of laser energy thereby causing the shape, and thus the corrective power, of the lens to change. The invention is particularly useful for correcting postoperative astigmatism.
    Type: Grant
    Filed: November 2, 1984
    Date of Patent: March 11, 1986
    Inventor: Don R. Johnson
  • Patent number: 4402260
    Abstract: A cotton module builder has a hydraulic cylinder which extends far above the top of the builder in operating position. The cylinder is latched in the upper position so that it may be lowered when the module builder is moved. A wedge-shaped tongue upon the carriage of the builder is hydraulically moved into a tube having an inclined surface to snugly wedge and latch the tramper cylinder into the upper operating position. The source of hydraulic pressure to move the wedge-shaped tongues is taken from the top of the hydraulic latch cylinder; therefore the latch may be withdrawn or released only when there is pressure in the top of the tramper cylinder, which will be forcing the tramper cylinder in the up position.
    Type: Grant
    Filed: October 13, 1981
    Date of Patent: September 6, 1983
    Assignee: Harris & Thrush Manufacturing Company
    Inventor: Don R. Johnson
  • Patent number: 4382631
    Abstract: A seed cotton transport is provided to transport seed cotton from the cotton stripper or harvester to a module builder. The basket upon the trailer or transport is pivoted about a point which is elevated above the sides of the module builder which is approximately eleven feet above the surface of the ground. The pivot is outboard of the wheels of the trailer. In the dump position, the weight is primarily to one side and as indicated above is very high. To prevent the trailer from overturning, stabilizing struts are hydraulicly extended any time the tilt or dump cylinders are pressurized to elevate the basket. A restricted one-way valve is used to insure that the cylinders operate in proper sequence.
    Type: Grant
    Filed: May 18, 1981
    Date of Patent: May 10, 1983
    Assignee: Harris & Thrush Manufacturing Company
    Inventor: Don R. Johnson
  • Patent number: 4347696
    Abstract: Lift arms are mounted upon a cotton module builder. Cotton harvested from the field is placed into a basket which sets upon a convex guide upon a trailer. The trailer is pulled by a tractor to the module builder alongside the arms. The guide, together with the basket, is moved laterally toward the module builder. The arms are actuated to lift the basket from the guide to above the module builder. As the basket moves above the module builder a trip upon the module builder unlatches a door formed by one of the sides of the basket allowing the cotton to fall from the basket into the module builder. After the cotton has emptied into the module builder the basket is returned to the guide upon the trailer. The basket on the trailer is then moved to a harvester and refilled with harvested cotton.
    Type: Grant
    Filed: March 20, 1981
    Date of Patent: September 7, 1982
    Assignee: Harris & Thrush Manufacturing Company
    Inventor: Don R. Johnson
  • Patent number: 4313631
    Abstract: A latch for the door of a module builder includes a plate attached to the door and a notched latch bar pivoted to the frame of the module builder. A hydraulic latch cylinder raises the latch bar at the same time pressure is applied to a main door cylinder to open the door. An orifice is placed adjacent to the main door opening cylinder to make certain sufficient hydraulic fluid is applied to the latch opener and also to limit the speed by which the door is closed. The latch cylinder is attached to a floating bar so that upon the door closing, the latch bar can rise to be latched closed even though the latch cylinder is closed.
    Type: Grant
    Filed: December 3, 1979
    Date of Patent: February 2, 1982
    Assignee: Harris & Thrush Manufacturing Company
    Inventor: Don R. Johnson
  • Patent number: 4286511
    Abstract: A cotton module builder has a hydraulic cylinder which extends far above the top of the builder in operating position. The cylinder is latched in the upper position so that it may be lowered when the module builder is moved. A hook on the cylinder is engaged by bails upon a toggle lever so that the latch will not release the cylinder unless the cylinder is in a relaxed condition.
    Type: Grant
    Filed: June 19, 1980
    Date of Patent: September 1, 1981
    Assignee: Harris & Thrush Manufacturing Company
    Inventor: Don R. Johnson