Patents by Inventor Iolanta Vladimiro Lesene

Iolanta Vladimiro Lesene 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).

  • Diethylaminohydroxypropyl cellulose I or II and a method for preparing same
    Patent number: 3974139
    Abstract: The invention relates to diethylaminohydroxypropyl derivatives of cellulose I or II having maximum weight percentage of nitrogen of 1.6 and 6.3 respectively, and having the power to sorb 7.5 - 14 and 11.5 - 36 per cent of water, respectively, at a temperature of 20.degree.C and a relative humidity of 63 per cent. The invention relates also to the method for preparing these cellulose derivatives which consists in treating diethylaminohydroxypropyl derivatives of cellulose I or II having maximum weight percentage of nitrogen of 1.6 and 6.3 respectively and having the power to sorb a maximum of 7.3 or 11 per cent of water respectively, at a temperature of 20.degree.C and relative humidity of 63 percent, with acetic acid or with its aqueous solutions, taking not less than 0.1 mole of acetic acid per mole of diethylaminohydroxypropyl groups. The proposed derivatives of cellulose have highly accessible structure, increased reactivity and lowered chromacity.
    Type: Grant
    Filed: July 12, 1974
    Date of Patent: August 10, 1976
    Inventors: Rimas-Kazimeras Mechislovo Noreika, Juozas-Romanas Juozo Musnitskas, Iolanta Vladimiro Lesene, Ionas Iona Zdanavichjus