1
Fritz Wittwer, Ivan Tomka: Polymer composition for injection molding. Warner Lambert Company, Howard Olevsky, Stephen Raines, June 16, 1987: US04673438 (181 worldwide citation)

Capsules and other shaped products formed from a moldable starch composition in an injection molding device is disclosed in the present invention. The composition comprising starch having a molecular mass range of 10,000 to 20,000,000 Dalton, and a water content range from 5 to 30% by weight. The st ...


2
Fritz Wittwer, Ivan Tomka, Hans Ulrich Bodenmann, Thomas Raible, Louis S Gillow: Method for forming pharmaceutical capsules from hydrophilic polymers. Warner Lambert Company, Howard Olevsky, Stephen Raines, April 19, 1988: US04738817 (101 worldwide citation)

Novel injection molded pharmaceutical capsules of gelatin having a cap member, a body member, means to form a plurality of compartments therein, and means for locking the cap and body members together to form a tamper-resistant connection.


3
Ivan Tomka: Thermoplastically processable starch and a method of making it. Ostrolenk Faber Gerb & Soffen, November 8, 1994: US05362777 (99 worldwide citation)

In order to produce thermoplastically processable starch, an additive or plasticizer respectively is mixed with native or natural starch and the mixture is caused to melt by the application of heat and mechanical energy. The additive is a substance which lowers the melting point of the starch so tha ...


4
Ivan Tomka: Biologically degradable polymer mixture. Bio tec Biologische Naturverpackungen, Ostrolenk Faber Gerb & Soffen, December 1, 1998: US05844023 (93 worldwide citation)

A biologically degradable polymer mixture is proposed which consists essentially of starch and at least one hydrophobic polymer. The hydrophobic polymer is in this connection at least substantially biologically degradable and thermoplastically processable and the mixture with the starch comprising a ...


5
Ivan Tomka: Biologically degradable polymer mixture. Bio Tec Biologische Naturverpackungen & Co KG, Workman Nydegger & Seeley, April 10, 2001: US06214907 (73 worldwide citation)

A biologically degradable polymer mixture is proposed which consists essentially of starch and at least one hydrophobic polymer. The hydrophobic polymer is in this connection at least substantially biologically degradable and thermoplastically processable and the mixture with the starch comprising a ...


6
Fritz Wittwer, Ivan Tomka: Starch based formulations. Warner Lambert Company, Fitzpatrick Cella Harper & Scinto, June 27, 1995: US05427614 (68 worldwide citation)

Starch based formulations for processing under applied pressure which are particulate and free-flowing at room temperatures, characterized in that it contains:


7
Fritz Wittwer, Ivan Tomka, Hans Ulrich Bodenmann, Thomas Raible, Louis S Gillow: Method for forming pharmaceutical capsules from starch compositions. Warner Lambert Company, Howard Olevsky, Stephen Raines, April 19, 1988: US04738724 (68 worldwide citation)

Novel injection molded pharmaceutical capsules of starch having a cap member, a body member, means to form a plurality of compartments therein; and means for locking the cap and body members together to form a tamper-resistant connection.


8
Fritz Wittwer, Ivan Tomka: Hydrophilic polymer compositions for injection molding. Warner Lambert Company, Howard Olevsky, Stephen Raines, April 7, 1987: US04655840 (67 worldwide citation)

A moldable hydrophilic polymer composition, preferably gelatin, for use in an injection molding device preferably controlled with a microprocessor. The composition has a molecular mass range of 10,000 to 2,000,000 Dalton or a molecular mass range of 10,000 to 2,000,000 and 10,000,000 to 20,000,000 D ...


9
Ivan Tomka: Biodegradable mould material. Ostrolenk Faber Gerb & Soffen, January 18, 1994: US05280055 (61 worldwide citation)

A biodegradable mould material or polymer blend with a high resistance to moisture is obtained by mixing thermoplastically processable starch with a cellulose derivative, such as a cellulose ester.


10
Robert F T Stepto, Ivan Tomka, Beat Dobler, Keith Pyrah: Destructurized starch and method for making same. Warner Lambert Company, Fitzpatrick Cella Harper & Scinto, January 17, 1995: US05382611 (59 worldwide citation)

A destructurized native starch material is described which has a water content in the range of about 10 to 25% by weight and that its mass average molar mass is reduced by a factor of 2 to 5000 compared to its original mass average molar mass. The destructurized starch is produced by heating a chemi ...