Patents by Inventor Lester M. Larson

Lester M. Larson 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).

  • Gamma radiation treated material
    Patent number: 5540876
    Abstract: Materials and items made of thermoplastic polyesters, such as poly (epsilon-caprolactone), synthetic rubber, such as Transpolyisoprene and Neoprene, and natural rubber, such as balata have improved properties when subjected to gamma radiation in the range from 0.5 to 30 megarads.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: July 30, 1996
    Inventors: Peter M. Larson, Lester M. Larson
  • Gamma radiation treated sheet material for use as orthopedic splints and casts and the like
    Patent number: 5378531
    Abstract: Orthopedic splint materials made with thermoplastic polyester, particularly poly (epsilon-caprolactone) with a molecular weight of over 5,000 and melting between 50.degree. C. and 100.degree. C. have improved properties when subjected to gamma radiation in the range from 0.5 to 30 megarads.
    Type: Grant
    Filed: July 9, 1993
    Date of Patent: January 3, 1995
    Inventors: Peter M. Larson, Lester M. Larson
  • Shoe insole of a solid crystalline polymer
    Patent number: 4006542
    Abstract: Heat softened polydienic sheets, such as transpolyisoprene or polychloroprene, are usefully mounted in rolls, the layers being separated by powders or granules such as salt to prevent cohesion, and the salt is preferably dusted off as used, or the sheet is passed through a warm water bath which will remove the salt and warm it and softening to an applying state useful for many purposes. It can be shaped as an in-sole for shoes and upon softening will accept the shape of the wearer's foot greatly improving the comfort; or as breast plates, athletic supporters, knee guards, head guards such as a helmet, ear guards or ear supports which may carry sound transfer means, i.e., such as headphones or a hearing aid; or it may be used as a bandage and for which purpose it can be reinforced by a long fiber and the comfort of the plastic bandage can be modified as by having perforations filled with fiber to transmit moisture from side to side.
    Type: Grant
    Filed: November 4, 1974
    Date of Patent: February 8, 1977
    Assignee: Larson Corporation
    Inventor: Lester M. Larson
  • Thermoplastic splint or cast
    Patent number: RE30541
    Abstract: Polydiene sheet material useful as a body supporting member such as a cast or splint, heat softenable at a higher than body temperature, but slowly recrystallizable or hardenable below about 40.degree. C., treated by distributing throughout the substance small pores, perforations or surface irregularities as by foaming all or only one surface portion of the sheet material, particularly texturing, knurling, pocking or cratering the surface to be placed adjacent to the body member to be encased to allow moisture and/or air transfer away from the enclosed body surface.
    Type: Grant
    Filed: November 12, 1976
    Date of Patent: March 10, 1981
    Inventor: Lester M. Larson