Patents by Inventor Peter D. Aldrich

Peter D. Aldrich 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 and apparatus for fiber optic backscattered light measurement to determine flow rates of multi-phase streams
    Patent number: 4978863
    Abstract: Flow rates of multi-phase streams may be determined by use of a fiber optic probe which establishes an illuminated sensing zone of finite dimensions. The probe collects light backscattered from the zone, the collected light being converted by a photodiode to voltage waveforms. Flow rate is determined by sampling voltage waveforms at discrete points in time, the sample being digitized and the digits being autocorrelated for such discrete points.
    Type: Grant
    Filed: September 6, 1988
    Date of Patent: December 18, 1990
    Assignee: The Dow Chemical Company
    Inventors: John W. Lyons, John A. Roper, III, Peter D. Aldrich
  • Copolymer of vinylbenzyl ether of polyhydric halogenated phenolic compound and aromatic polycyanate ester compound
    Patent number: 4774316
    Abstract: The polyfunctional vinylbenzyl ethers of polyhydric halogenated phenolic compounds are prepared and can be copolymerized with polycyanate ester compounds to provide copolymers having dielectric constants below 3 and a V-O rating in a UL-94 test.
    Type: Grant
    Filed: August 15, 1986
    Date of Patent: September 27, 1988
    Assignee: The Dow Chemical Company
    Inventors: James P. Godschalx, Edmund P. Woo, Patricia A. Schrader, Peter D. Aldrich