Patents by Inventor John E. Davis

John E. Davis 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: 5093412
    Abstract: Macromers for use in preparing stable, low viscosity graft polymer polyols of high solids content are disclosed. These macromers are easily made in high yield with short cycle times, and may be used to prepare graft dispersions containing amine based polyols.
    Type: Grant
    Filed: August 23, 1989
    Date of Patent: March 3, 1992
    Assignee: BASF Corporation
    Inventors: Donald C. Mente, John E. Davis, Steven D. Gagnon, Duane A. Heyman
  • Patent number: 4959774
    Abstract: A highly reliable shadow memory system is able to survive multiple fast sequence power failures and includes a volatile main memory and a shadow memory subsystem which continually monitors write accesses to the main memory. The shadow memory subsystem includes a disk drive or shadow memory storing a copy of the data in main memory. As the main memory contents are altered, the shadow memory is continually updated to reflect the changes while main utility power is available. In the event of a main utility power failure, backup power is required to store main memory data in the shadow memory for only a few storage locations for which the updating of the shadow memory may lag main memory data changes. Consequently, only a small portion of available battery backup power is required to preserve all main memory data and the system can withstand multiple rapid succession power failures without loss of data.
    Type: Grant
    Filed: June 30, 1989
    Date of Patent: September 25, 1990
    Assignee: Ampex Corporation
    Inventor: John E. Davis
  • Patent number: 4661531
    Abstract: Graft polymer dispersions in a polyol are prepared by a continuous process employing in situ free radical polymerization of an ethylenically unsaturated monomer in a polyol containing from about 0.001 to 0.09 mole of induced unsaturation per mole of polyol in the presence of an effective amount of a chain transfer agent. Products prepared by this process have uniform viscosity with resulting product uniformity. Polyurethane foams incorporating flame retardants prepared from these dispersions readily pass the California No. 117 Flame Test.
    Type: Grant
    Filed: April 10, 1985
    Date of Patent: April 28, 1987
    Assignee: BASF Corporation
    Inventors: John E. Davis, Duane A. Heyman
  • Patent number: 4569481
    Abstract: A center pivot irrigation machine having a swing arm for irrigating corner areas of a field. The swing arm has a steerable support tower which follows a buried cable to guide the swing arm into and out of the field corners. A double hinge connection between the main irrigation boom and the swing arm includes one hinge joint which accommodates pivoting of the swing arm and another hinge joint which controls the operation of the tower drive motors. A cam switch monitors the steering angle of the swing arm tower and turns the sprinklers of the swing tower on and off in accordance with the steering angle to achieve uniform water application. A secondary set of sprinklers on the main boom is deactivated and the entire machine is slowed when the steering angle indicates that the swing arm is covering a rapidly increasing area.
    Type: Grant
    Filed: March 29, 1982
    Date of Patent: February 11, 1986
    Assignee: Reinke Manufacturing Co., Inc.
    Inventors: John E. Davis, Terry L. Zielke, Ronald J. Coash
  • Patent number: 4549694
    Abstract: A center pivot irrigation machine having a swing arm for irrigating corner areas of a field. The swing arm has a steerable support tower which follows a buried cable to guide the swing arm into and out of the field corners. A double hinge connection between the main irrigation boom and the swing arm includes one hinge joint which accommodates pivoting of the swing arm and another hinge joint which controls the operation of the tower drive motors. A cam switch monitors the steering angle of the swing arm tower and turns the sprinklers of the swing tower on and off in accordance with the steering angle to achieve uniform water application. A secondary set of sprinklers on the main boom is deactivated and the entire machine is slowed when the steering angle indicates that the swing arm is covering a rapidly increasing area.
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: October 29, 1985
    Inventors: John E. Davis, Terry L. Zielke, Ronald J. Coash
  • Patent number: 4508269
    Abstract: A center pivot irrigation machine having a swing arm for irrigating corner areas of a field. The swing arm has a steerable support tower which follows a buried cable to guide the swing arm into and out of the field corners. A double hinge connection between the main irrigation boom and the swing arm includes one hinge joint which accommodates pivoting of the swing arm and another hinge joint which controls the operation of the tower drive motors. A cam switch monitors the steering angle of the swing arm tower and turns the sprinklers of the swing tower on and off in accordance with the steering angle to achieve uniform water application. A secondary set of sprinklers on the main boom is deactivated and the entire machine is slowed when the steering angle indicates that the swing arm is covering a rapidly increasing area.
    Type: Grant
    Filed: November 14, 1983
    Date of Patent: April 2, 1985
    Assignee: Reinke Manufacturing Co., Inc.
    Inventors: John E. Davis, Terry L. Zielke, Ronald J. Coash
  • Patent number: 4359571
    Abstract: The present invention relates to a process for the preparation of stable graft polymer dispersions having improved dispersibility by a free radical polymerization of an ethylenically unsaturated monomer under conditions of no-reflux or alternatively under conditions that do not return the evaporated monomer to the dispersion. Polyurethane foams may be prepared from these polymer dispersions.
    Type: Grant
    Filed: September 2, 1981
    Date of Patent: November 16, 1982
    Assignee: BASF Wyandotte Corporation
    Inventors: William A. Bernstein, John E. Davis, Joseph R. Gregoria, Jr.
  • Patent number: 4321342
    Abstract: Curable mixtures of polyepoxides and amine-terminated polymers are employed. The amine-terminated polymers are prepared by the in situ free radical polymerization of ethylenically unsaturated monomer or monomers in amine-terminated polyoxyalkylene polyether polymers.
    Type: Grant
    Filed: February 27, 1981
    Date of Patent: March 23, 1982
    Assignee: BASF Wyandotte Corporation
    Inventors: John E. Davis, Moses Cenker
  • Patent number: 4286074
    Abstract: Stable graft polymer dispersions are prepared employing in situ free radical polymerization of ethylenically unsaturated monomer or monomers in an amine-terminated polyoxyalkylene polyether polymer. These dispersions are useful in the preparation of polyurethane foams which have improved tensile strength, elongation, load deflection and tear strength properties.
    Type: Grant
    Filed: April 4, 1980
    Date of Patent: August 25, 1981
    Assignee: BASF Wyandotte Corporation
    Inventors: John E. Davis, Moses Cenker
  • Patent number: 4161468
    Abstract: Graft polymer dispersions are prepared by the in situ polymerization in the presence of a free radical catalyst of an ethylenically unsaturated monomer or mixture of monomers in a liquid polyol employing as the free radical catalyst a liquid unsymmetrically-substituted azo compound having a melting point less than 30.degree. C. and a ten hour half-life between 55.degree. C. and 100.degree. C. The dispersions are low viscous liquids which may be advantageously employed in the preparation of polyurethane foams.
    Type: Grant
    Filed: June 7, 1978
    Date of Patent: July 17, 1979
    Assignee: BASF Wyandotte Corporation
    Inventors: John E. Davis, Pauls Davis
  • Patent number: 4018575
    Abstract: A low-density abrasive article, especially suited for scouring steel griddle surfaces without causing undesirable surface roughness thereto, comprises a lofty, open, fibrous web of curved continuous glass filament bundles which is impregnated with a hard thermoset resin containing abrasive particles.
    Type: Grant
    Filed: March 18, 1974
    Date of Patent: April 19, 1977
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: John E. Davis, Thomas R. McAvoy
  • Patent number: D255455
    Type: Grant
    Filed: February 10, 1978
    Date of Patent: June 17, 1980
    Assignee: Photomatrix Corporation
    Inventors: Karl H. Gensike, John E. Davis