Patents by Inventor Mihai Constantinescu

Mihai Constantinescu 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).

  • Process for preparing medicinal dressings
    Patent number: 3939831
    Abstract: Collagen-based medicinal dressings are produced by freezing a collagen aqueous polydispersion obtained from cattle hide in a concentration of 0.66 to 2% by weight at a temperature of at most -65.degree.C and subjecting the frozen polydispersion to vacuum at a pressure of 10.sup.-.sup.3 to 10.sup.-.sup.5 torr for a period of 24 to 48 hours while maintaining a temperature thereof of at most +35.degree.C. The resulting spongy mass has a density of 0.03 to 0.06 gram/cm.sup.3.
    Type: Grant
    Filed: March 4, 1974
    Date of Patent: February 24, 1976
    Assignee: Intreprinderea Flacara Rosie
    Inventors: Gheorghe Cioca, Nicolae Tigaeru, Agrippa Ionescu, Nicolae Chiotan, Mihai Constantinescu, Gheorghe Niculescu