Patents by Inventor Daniel R. Mayfield

Daniel R. Mayfield 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).

  • Publication number: 20240026251
    Abstract: The present invention relates to solvent compositions and processes for inhibiting the generation of peroxide in glycol ether solvents. In one aspect, a solvent composition comprises at least one glycol ether, at least one antioxidant, wherein the at least one antioxidant is selected from the group consisting of L-ascorbic acid-6-hexadecanoate, pentaerythritol tetrakis(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate), and mixtures thereof, wherein the amount of the antioxidant in the solvent composition is less than or equal to 1,000 ppm by weight based on the total weight of the solvent composition and a peroxide, wherein the amount of the peroxide in the solvent composition is less than 20 ppm, based on the total weight of the solvent composition.
    Type: Application
    Filed: January 13, 2022
    Publication date: January 25, 2024
    Inventors: Felipe A. Donate, Daniel R. Mayfield
  • Patent number: 8862500
    Abstract: Information pertaining to billboards and similar advertising spaces can be obtained using a plurality of capture devices positioned in vehicles traveling along various roadways. Information regarding the advertising spaces is determined from the images and stored in at least one data store. Image analysis and manipulation can be used to isolate images or image portions that potentially correspond to the advertising spaces, and these image portions can be presented to users who are able to quickly identify whether the image portion contains a billboard and, if so, the contents of that billboard. The information then can be analyzed in order to provide a billboard advertising system wherein advertisers can view billboard information and purchase advertising space without having to contact a broker or other intermediary.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: October 14, 2014
    Assignee: Amazon Technologies, Inc.
    Inventor: Daniel R. Mayfield
  • Patent number: 5597277
    Abstract: A sportsman's flotation device is disclosed, having a hull including a bow, stern and a full keel, a seat disposed within the keel and an opening defined in the device for receiving the sportsman's legs therethrough for propelling and directing the device. The device may include a buoyancy activated barrier for opening an closing an exit, interchangeable stern adapters for modifying the shape or configuration of the device and detachable wheel and handles for transporting the device. Also included are a plurality of attachment points on the hull for receiving a variety of attachments associated with hunting, fishing and outdoor recreation, including a car top carrier.
    Type: Grant
    Filed: December 30, 1994
    Date of Patent: January 28, 1997
    Inventor: Daniel R. Mayfield
  • Patent number: 5540179
    Abstract: The invention is a buoyancy activated barrier for opening an closing an aperture defined in the stern of a sportsman's flotation device which permits the user to easily and quickly enter and exit the flotation device. The barrier is slidably mounted in the aperture of the flotation device such that it is free to establish its own level of equilibrium in the water, thereby defining its own waterline. When the user wishes to enter the flotation device, it is unloaded, and the upper surface of the barrier is spaced relatively below the top surface of the flotation device, providing an easy passageway for the user. When the user sits in the flotation device, loading it, the upper surface of the barrier becomes level with the upper surface of the flotation device, closing the aperture, to provide a protected, confined space for the user. When the user wishes to exit the flotation device, she simply stands up in shallow water, thus unloading the flotation device.
    Type: Grant
    Filed: September 29, 1995
    Date of Patent: July 30, 1996
    Inventor: Daniel R. Mayfield