Patents by Inventor Wei C. Chang

Wei C. Chang 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: 5200474
    Abstract: A polyimide adhesive composition is a reaction product of polyamic acid and bismaleimide (I) modified by barbituric acid (II) or the derivatives thereof. Once the present composition is directly coated onto copper foil, the bonding force is greatly improved as compared to compositions without (II) or (I) and (II). Therefore, the adhesive normally used in the manufacture of flexible printed circuits boards and tape automated bonding (TAB) is no longer necessary.
    Type: Grant
    Filed: August 22, 1990
    Date of Patent: April 6, 1993
    Assignee: Industrial Technology Research Institute
    Inventors: Ker M. Chen, Jing P. Pan, Gwo Y. Shiau, Tsung H. Wang, Wei C. Chang
  • Patent number: 4603784
    Abstract: A nursing bottle system includes axially joined first and second container bodies or portions. The container bodies are liquid tightly separated from one another by a wall extending perpendicularly to the container axis. Different liquid foods can be carried in the container bodies, and fed as desired to an infant through a nipple provided at the open end of the selected container body of the system.
    Type: Grant
    Filed: December 31, 1985
    Date of Patent: August 5, 1986
    Inventor: Wei C. Chang