Patents by Inventor John A. Ayer

John A. Ayer 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).

  • Fiber length analyzer
    Patent number: 5293219
    Abstract: A measuring cell (22) in a fiber sample analysis system (10) contains housing member (76) which removably supports a transparent flow tube (82) and an optical device (26) which projects a beam (124) across the tube for detecting and measuring individual fibers in a dilute sample fluid which flows through the tube at a constant velocity. The tube includes a gradually narrowing transition portion (86) leading to a measurement portion (88) situated at the optical device and having a flow diameter in the range of about 1.0 to 3.0 mm.
    Type: Grant
    Filed: December 31, 1991
    Date of Patent: March 8, 1994
    Assignee: Andritz Sprout-Bauer, Inc.
    Inventor: John A. Ayer