Patents Assigned to Greystone
  • Safety swimsuit with floats made of polymer fibres enclosing a gas
    Patent number: 12514306
    Abstract: One-piece safety swimsuit 1, extending from at least the crotch up to the top of the shoulders and comprising buoyancy elements 2, 7 configured to keep a user of the swimsuit 1 above water from the shoulders, each buoyancy element 2, 7 comprising several sheets stacked on top of each other, each sheet being from 1.05 mm to 1.50 mm thick, preferably from 1.10 mm to 1.30 mm thick, even more preferably 1.20 mm thick, said sheets being composed of polymer fibres enclosing a volume of a gas that is greater than the volume of the polymer.
    Type: Grant
    Filed: March 2, 2023
    Date of Patent: January 6, 2026
    Assignee: GREYSTONE
    Inventor: Alain Belkadi
  • Method and means for sand reblending
    Publication number: 20040144797
    Abstract: A method and apparatus for reblending sand whereby multiple reblending tanks with a plurality of reblending stations have thin respective outputs joined through a single control system.
    Type: Application
    Filed: January 3, 2003
    Publication date: July 29, 2004
    Applicant: Greystone
    Inventors: William J. Bennington, Franklin E. Squires