Patents by Inventor Lester R. Melby

Lester R. Melby 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).

  • Cobalt (II) chelates as chain transfer agents in free radical polymerizations
    Patent number: 4680352
    Abstract: Free radical polymerization processes employing cobalt(II) chelates of vicinal iminohydroxyimino compounds, diazadihydroxyiminodialkyldecadienes and -undecadienes, tetraazatetraalkylcyclotetradecatetraenes and -dodecatetraenes, N,N'-bis(salicylidene)ethylenediamines and dialkyldiazadioxodialkyldodecadienes and -tridecadienes as catalytic chain transfer agents for controlling the molecular weight of the homopolymers and copolymers produced.
    Type: Grant
    Filed: January 27, 1986
    Date of Patent: July 14, 1987
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Andrew H. Janowicz, Lester R. Melby
  • Glycidyl methacrylate polymers, their preparation and solvolysis products
    Patent number: 4388448
    Abstract: Homopolymers of glycidyl methacrylate (GMA) and copolymers of GMA with other methacrylate comonomers; their preparation employing an anionic initiator which is the adduct of a selected organo(alkali metal) compound and at least one mole of methyl methacrylate or another lower alkyl methacrylate; as well as solvolyzed forms of the GMA polymers.
    Type: Grant
    Filed: February 23, 1981
    Date of Patent: June 14, 1983
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Lester R. Melby