Patents by Inventor Bradley L. Duell

Bradley L. Duell 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).

  • Microcapsules from polyfunctional aziridines
    Patent number: 5401505
    Abstract: Microcapsules containing a shell wall and a liquid fill are produced by an interfacial polymerization reaction between a polyfunctional aziridine and at least one other polyfunctional organic coreactant selected from the group of polyacid halides, polycarboxylic acids, polyamines, polyhydroxyl-containing compounds, polythiol-containing compounds, polyisocyanates, polyisothiocyanates, and mixtures thereof.
    Type: Grant
    Filed: June 1, 1992
    Date of Patent: March 28, 1995
    Assignee: Minnesota Mining and Manufacturing
    Inventors: Bradley L. Duell, Daniel B. Pendergrass, Jr.
  • Microcapsules from polyfunctional aziridines
    Patent number: 5169632
    Abstract: Microcapsules containing a shell wall and a liquid fill are produced by an interfacial polymerization reaction between a polyfunctional aziridine and at least one other polyfunctional organic coreactant selected from the group of polyacid halides, polycarboxylic acids, polyamines, polyhydroxyl-containing compounds, polythiol-containing compounds, polyisocyanates, polyisothiocyanates, and mixtures thereof.
    Type: Grant
    Filed: March 28, 1991
    Date of Patent: December 8, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Bradley L. Duell, Daniel B. Pendergrass, Jr.