Patents Assigned to Coloroll Limited
  • Plastics based composition containing a polyester resin and alkaline modified starch granules
    Patent number: 4420576
    Abstract: A plastics-based composition comprising a polyester resin and starch granules which, prior to mixing with the resin, are rendered reactive with the resin by a surface implant of alkali metal or alkaline earth metal ions.
    Type: Grant
    Filed: July 29, 1981
    Date of Patent: December 13, 1983
    Assignee: Coloroll Limited
    Inventor: Gerald J. L. Griffin
  • Process for incorporating a modifier of properties of a shaped synthetic polymer containing a biodegradable substance therein, and the product of the process
    Patent number: 4324709
    Abstract: In the manufacture of products made of starch filled plastics the polymer and starch granules are mixed with a lubricant immediately prior to forming. A feedstock material in accordance with the invention comprises paticles of starch granules in admixture with a lubricant such as an oil or wax.
    Type: Grant
    Filed: February 20, 1980
    Date of Patent: April 13, 1982
    Assignee: Coloroll Limited
    Inventor: Gerald J. L. Griffin
  • Shaped synthetic polymers containing a biodegradable substance
    Patent number: 4218350
    Abstract: In the manufacture of products made of starch filled plastics the polymer and starch granules are mixed with a lubricant immediately prior to forming. A feedstock material in accordance with the invention comprises particles of starch granules in admixture with a lubricant such as an oil or wax.
    Type: Grant
    Filed: September 8, 1978
    Date of Patent: August 19, 1980
    Assignee: Coloroll Limited
    Inventor: Gerald J. L. Griffin
  • Synthetic/resin based compositions
    Patent number: 4125495
    Abstract: A biodegradable composition contains a high proportion, i.e., over 50% of biodegradable starch. The composition is particularly useful for making trays for holding meat. These trays are liquid repellant but gas permeable.
    Type: Grant
    Filed: March 7, 1977
    Date of Patent: November 14, 1978
    Assignee: Coloroll Limited
    Inventor: Gerald J. L. Griffin
  • Synthetic resin sheet material
    Patent number: 4021388
    Abstract: A biodegradable composition comprises a synthetic resin, a biodegradable granular filler such as natural starch and preferably a substance autoxidizable to yield a peroxide which attacks the carbon to carbon linkages in the resin.
    Type: Grant
    Filed: March 10, 1976
    Date of Patent: May 3, 1977
    Assignee: Coloroll Limited
    Inventor: Gerald Joseph Louis Griffin
  • Biodegradable synthetic resin sheet material containing starch and a fatty material
    Patent number: 4016117
    Abstract: A biodegradable composition comprises a synthetic resin, a biodegradable granular filler such as natural starch and preferably a substance autoxidizable to yield a peroxide which attacks the carbon to carbon linkages in the resin.
    Type: Grant
    Filed: November 25, 1974
    Date of Patent: April 5, 1977
    Assignee: Coloroll Limited
    Inventor: Gerald Joseph Louis Griffin