Patents Assigned to Duraglass Research & Development Corp.
  • Strengthening of glass
    Patent number: 4130407
    Abstract: Glass is strengthened against failure under tension by treating the glass with a combination of straight chain, saturated, terminal monocarboxyl fatty acid plus the salt of an alkali metal or an alkaline-earth metal, both dissolved in an inert carrier and applied to the glass at a temperature in a preferred range between 100.degree. and 300.degree. C., after which the glass is slowly cooled to avoid thermal stress.
    Type: Grant
    Filed: June 16, 1977
    Date of Patent: December 19, 1978
    Assignee: Duraglass Research & Development Corp.
    Inventor: Nobel Ida