Patents by Inventor Joseph H. Simmons

Joseph H. Simmons 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).

  • Method of producing a glass article having a graded refractive index profile of a parabolic nature
    Patent number: 4302231
    Abstract: A method of producing a glass article having a graded refractive index profile of a parabolic nature is disclosed.
    Type: Grant
    Filed: January 29, 1979
    Date of Patent: November 24, 1981
    Assignees: Pedro Manoel Buarque De Macedo, Theodore Aaron Litovitz
    Inventors: Pedro B. Macedo, Joseph H. Simmons, Shigeo Murai
  • Joint doping of porous glasses to produce materials with high modifier concentrations
    Patent number: 4299608
    Abstract: A glass composition having at least 85 mole percent of SiO.sub.2, where the improvement comprises at least 7 wt percent of at least one member selected from the group consisting of PbO and Bi.sub.2 O.sub.3 and at least 1.5 mole percent of at least one member selected from the group consisting of K.sub.2 O, Rb.sub.2 O and Cs.sub.2 O.
    Type: Grant
    Filed: September 14, 1979
    Date of Patent: November 10, 1981
    Assignees: Pedro Buarque de Macedo, Theodore Aaron Litovits
    Inventors: Pedro B. Macedo, Mrinmay Samanta, Joseph H. Simmons
  • Fixation of radioactive materials in a glass matrix
    Patent number: 4224177
    Abstract: This invention relates to radioactive materials which are fixed, stored, entrapped, encapsulated, or otherwise rendered immobile in a glass matrix for extremely long periods of time. Radioactive material such as radioactive wastes are incorporated into a glass matrix by a process of "molecular stuffing" a porous glass either with a radioactive gas which is trapped in the porous glass by dissolution during sintering of the pores of the glass, or with a salt solution containing radioactive material such as CsNO.sub.3, Sr(NO.sub.3), etc., or with a combination of both salt solution and radioactive gas, followed by drying and sintering of the pores of the glass whereby these radioactive materials upon chemical change to their oxides, excepting of course the noble gases which remain in molecular form, become a part of the integrated glass structure.
    Type: Grant
    Filed: March 9, 1978
    Date of Patent: September 23, 1980
    Assignees: Pedro B. Macedo, Theodore A. Litovitz
    Inventors: Pedro B. Macedo, Joseph H. Simmons, Theodore A. Litovitz
  • Joint doping of porous glasses to produce materials with high modifier concentrations
    Patent number: 4188198
    Abstract: A glass article is produced by doping a porous glass matrix with at least one member selected from the group consisting of PbO and Bi.sub.2 O.sub.3 and at least one member selected from the group consisting of K.sub.2 O, Rb.sub.2 O and Cs.sub.2 O, and producing a profile in dopant composition by immersion in a multiple-solvent solution.
    Type: Grant
    Filed: November 23, 1977
    Date of Patent: February 12, 1980
    Assignees: Pedro Buarque de Macedo, Theodore Aaron Litovits
    Inventors: Pedro B. Macedo, Joseph H. Simmons, Mrinmay Samanta
  • Joint doped porous glass article with high modifier concentrations
    Patent number: 4183620
    Abstract: A glass composition having at least 85 mole percent of SiO.sub.2, where the improvement comprises at least 7 wt percent of at least one member selected from the group consisting of PbO and Bi.sub.2 O.sub.3 and at least 1.5 mole percent of at least one member selected from the group consisting of K.sub.2 O, Rb.sub.2 O and Cs.sub.2 O.
    Type: Grant
    Filed: December 30, 1976
    Date of Patent: January 15, 1980
    Assignees: Pedro Buarque De Macedo, Theodore Aaron Litovits
    Inventors: Pedro B. Macedo, Mrinmay Samanta, Joseph H. Simmons