Patents by Inventor Hidehiko Maeoka

Hidehiko Maeoka 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).

  • Radiographic image conversion screens
    Patent number: 4536436
    Abstract: A radiographic image conversion screen comprises a support, a first fluorescent layer formed on the support and consisting essentially of a blue emitting phosphor and a second fluorescent layer formed on the first fluorescent layer and consisting essentially of a green emitting rare earth phosphor.
    Type: Grant
    Filed: May 21, 1984
    Date of Patent: August 20, 1985
    Assignee: Kasei Optonix, Ltd.
    Inventors: Hidehiko Maeoka, Etsuo Shimizu, Yujiro Suzuki, Keiji Shimiya, Norio Miura
  • Radiographic image conversion screens
    Patent number: 4529647
    Abstract: A radiographic image conversion screen comprising a support, a first fluorescent layer formed on the support and consisting essentially of a blue emitting phosphor and a second fluorescent layer formed on the first fluorescent layer and consisting essentially of a green emitting rare earth oxysulfide phosphor. The green emitting rare earth oxysulfide phosphor is represented by the formula: (Ln.sub.1-i, Yi, Tba, Rb).sub.2 O.sub.2 S where Ln is at least one element selected from the group consisting of La, Ga and Lu, R is at least one element selected from the group consisting of Dy, Pr, Yb and Nd, and i, a and b are numbers within the ranges of 0.ltoreq.i.ltoreq.0.35, 0.0005.ltoreq.a.ltoreq.0.09 and 0.0002.ltoreq.b.ltoreq.0.01 respectively.
    Type: Grant
    Filed: March 8, 1984
    Date of Patent: July 16, 1985
    Assignee: Kasei Optonix, Ltd.
    Inventors: Hidehiko Maeoka, Etsuo Shimizu, Yujiro Suzuki, Keiji Shimiya, Norio Miura
  • Radiographic image conversion screens
    Patent number: 4507563
    Abstract: A radiographic image conversion screen comprising a support, a first fluorescent layer formed on the support consisting essentially of a blue emitting phosphor and a second fluorescent layer formed on the first fluorescent layer consisting essentially of a green emitting rare earth phosphor.
    Type: Grant
    Filed: July 9, 1984
    Date of Patent: March 26, 1985
    Assignee: Kasei Optonix, Ltd.
    Inventors: Hidehiko Maeoka, Etsuo Shimizu, Yujiro Suzuki, Keiji Shimiya, Norio Miura
  • Radiographic image conversion screens
    Patent number: 4486486
    Abstract: A radiographic image conversion screen comprising a support, a first fluorescent layer formed on the support and consisting essentially of a blue emitting phosphor and a second fluorescent layer formed on the first fluorescent layer and consisting essentially of a green emitting rare earth oxysulfide phosphor. The green emitting rare earth oxysulfide phosphor is represented by the formula: (Ln.sub.1-i, Y.sub.i, Tb.sub.a, R.sub.b).sub.2 O.sub.2 S where Ln is at least one element selected from the group consisting of La, Gd and Lu, R is at least one element selected from the group consisting of Dy, Pr, Yb and Nd, and i, a and b are numbers within the ranges of 0.ltoreq.i.ltoreq.0.35, 0.0005.ltoreq.a.ltoreq.0.09 and 0.0002.ltoreq.b.ltoreq.0.01, respectively.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: December 4, 1984
    Assignee: Kasei Optonix, Ltd.
    Inventors: Hidehiko Maeoka, Etsuo Shimizu, Yujiro Suzuki, Keiji Shimiya, Norio Miura