Patents by Inventor Burton T. MacKenzie

Burton T. MacKenzie 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).

  • Maximum temperature indicator
    Patent number: 5490475
    Abstract: A maximum temperature indicator comprises a body of inexpensive and highly durable polymeric material adapted to be affixed to a support, such as within a mechanical device. The polymeric material undergoes a detectable physical change unique to a maximum temperature to which the polymeric material was exposed. After exposure, the polymeric material is easily tested to accurately determine the maximum temperature that the sample was exposed to.
    Type: Grant
    Filed: January 26, 1994
    Date of Patent: February 13, 1996
    Assignee: Camco International Inc.
    Inventors: Edward W. S. Bryant, Burton T. Mackenzie
  • Low profile submersible electrical cable
    Patent number: 4515993
    Abstract: A low profile electrical cable (10) suitable for use in an oil well where a high temperature corrosive atmosphere is present. The cable is comprised of a plurality of conductors (12) wherein each conductor is insulated by wrapping it in two heat-sealed layers (14) in an insulating material such as a polyimide plastic. The insulation layers around each conductor are then jacketed by an extruder layer (16) of a material which is mechanically and chemically stable to at least 400.degree. F. The insulated and jacketed conductors are disposed in a side-by-side parallel relationship and wrapped in a metal armor (20) such as a nickel-copper alloy. The physical properties of the insulating and jacketing materials allow very thin layers to be used for producing a cable which is smaller in overall dimensions than prior cables of comparable electrical capacity. Optionally, a braid (18) may be included around the jacket (16) of each conductor to enhance the overall strength characteristics of the cable.
    Type: Grant
    Filed: January 16, 1984
    Date of Patent: May 7, 1985
    Assignee: TRW Inc.
    Inventor: Burton T. MacKenzie
  • Fire retarding system for polymeric compositions, and a method and products comprising the same
    Patent number: 4421890
    Abstract: An improved and economical fire retarding system for polymeric compositions comprising the combination of a halogen-containing hydrocarbon and an oxide of iron; a method of rendering polymeric compositions resistant to flame; and the flame resistant polymeric compositions and products comprising the same.
    Type: Grant
    Filed: December 31, 1981
    Date of Patent: December 20, 1983
    Assignee: General Electric Company
    Inventors: Burton T. MacKenzie, Jr., Sidney Rothenberg
  • Dielectric insulating polyolefin compositions containing nitrile polysiloxane fluid, and conductor products insulated therewith
    Patent number: 4274990
    Abstract: Polyolefin compounds containing nitrile polysiloxane fluid which have improved electrical properties, and electrical conductors insulated therewith.
    Type: Grant
    Filed: February 5, 1979
    Date of Patent: June 23, 1981
    Inventors: Burton T. MacKenzie, Jr., Maurice Prober, Stanley E. Kiersztyn
  • Dielectric insulating polyolefin compounds and conductor products insulated therewith
    Patent number: 4153752
    Abstract: Polyolefin compounds containing nitrile polysiloxane fluid which have improved electrical properties, and electrical conductors insulated therewith.
    Type: Grant
    Filed: October 19, 1977
    Date of Patent: May 8, 1979
    Assignee: General Electric Company
    Inventors: Burton T. MacKenzie, Jr., Maurice Prober, Stanley E. Kiersztyn
  • Graded insulation cable construction, and method of overcoming stresses therein
    Patent number: 4132858
    Abstract: An electrical cable having an improved graded insulation which minimizes uneven electrical stresses caused therein by a lack of a symmetrical cable structure, and a method of overcoming disproportionate electrical stresses at interfaces intermediate the sections of a graded insulation for electrical cable.
    Type: Grant
    Filed: March 28, 1977
    Date of Patent: January 2, 1979
    Assignee: General Electric Company
    Inventors: Harry C. Anderson, Burton T. MacKenzie, Jr., Maurice Prober, Nirmal Singh