Patents by Inventor Karl Folkers

Karl Folkers 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).

  • Patent number: 3974187
    Abstract: Synthetic 2,3-dimethoxy-5-methyl-1,4-benzoquinone is converted into a series of new 6-alkyl derivatives. These 6-alkyl derivatives have straight carbon chains which are both saturated and unsaturated. The unsaturated derivatives contain one, two, three and four double bonds. These new synthetic quinones are analogs of the naturally occurring forms of coenzyme Q and have the same fundamental electron-transfer capacity of the natural forms of coenzyme Q. Although the degree of the activity of these new synthetic analogs differ, some of these new synthetic analogs are effective substitutes for the natural forms of coenzyme Q.
    Type: Grant
    Filed: February 28, 1975
    Date of Patent: August 10, 1976
    Inventors: Yieh-Ping Wan, Karl Folkers
  • Patent number: 3953416
    Abstract: A synthetic decapeptide, L-pglutamyl-L-histidyl-L-tryptophanyl-L-seryl-L-tyrosyl-glycyl-L-leucyl-L- arginyl-L-prolyl-glycinamide which has the hormonal activities of the luteinizing hormone releasing hormone (LRH) of the hypothalamus gland of mammals is produced by utilizing as the key starting materials, the amino acids, glutamic acid or pyroglutamic acid, histidine, tryptophan, serine, tyrosine, glycine, leucine, arginine, and proline. Synthesis of the decapeptide is accomplished by coupling, in appropriate combinations of appropriate protected forms of the amino acids, and finally deprotecting to yield the amide, L-pglutamyl-L-histidyl-L-tryptophanyl-L-seryl-L-tyrosyl-glycyl-L-leucyl-L- arginyl-L-prolyl-glycinamide.
    Type: Grant
    Filed: January 14, 1974
    Date of Patent: April 27, 1976
    Inventors: Karl Folkers, Bruce L. Currie, Jaw-Kang Chang, Hans Sievertsson, Conny Bogentoft
  • Patent number: 3944659
    Abstract: A method for producing the Folliculotropin Releasing Hormone (FRH) biosynthetically is provided by utilizing, as key starting materials, fresh hypothalamic tissue, a buffered incubation medium, an ATP synthesizing system, radioactively labeled amino acids and a mixture of 21 naturally occuring amino acids. Biosynthesis of the FRH is accomplished by incubation of the hypothalamic tissue for a short period of time in the presence of all the reagents necessary to promote the biosynthetic system to produce the Folliculotropin Releasing Hormone (FRH) of the hypothalamus gland of mammals. Examples of methods to isolate the FRH free of the luteotropin releasing hormone (LRH) are provided.
    Type: Grant
    Filed: December 13, 1972
    Date of Patent: March 16, 1976
    Inventors: Karl Folkers, Karl Nils Gunnar Johansson, Bruce L. Currie