Jeffrey Richard Owen
Engineers at Morris Ave, Salt Lake City, UT

4561963, Dec 31, 1985

Jul 30, 1984

6/635755

Jeffrey D. Owen - Salt Lake City UT
Harold M. Brown - Salt Lake City UT

Zinetics Medical Technology Corporation - Salt Lake City UT

G01N 2730

204433

A solid state electrode that includes a graphite core as both the internal reference and the electrical conductor that is preferably formed of graphite threads maintained as a bundle that in one embodiment, has an end thereof coated with a mixture of antimony and antimony oxide as a sensor element, the graphite junction forming the internal reference to that sensor element, and in another embodiment, the graphite core is wrapped tightly around a sensor formed from section or "shot" of a mixture antimony and antimony oxide, the graphite junction forming the internal reference thereto. The connected graphite core and antimony/antimony oxide sensor are then covered with an impermeable non-conductive plastic sheath, leaving a section of the antimony/antimony oxide sensor surface exposed, and the junction of that sheath to the antimony/antimony oxide sensor is preferably sealed as with an epoxy.

4431508, Feb 14, 1984

Dec 10, 1982

6/432651

Harold M. Brown - Salt Lake City UT
Jeffrey D. Owen - Salt Lake City UT

G01M 2726

204418

A solid state graphite electrode to determine the activity of an ion-specie in solution. The graphite electrode of the present invention can be adapted for use as either an external reference electrode, an ion-selective electrode or as an internal reference electrode. The electrode includes, as an electrically conductive element, a supported section of graphite that is appropriately electrically connected through a potentiometer to show a difference in ion concentration as a voltage potential or emf. One graphite surface for immersion in a test solution is hydrophobized by coating it with a solution that contains an organic liquid molecule to covalently bond with hydroxyl groups (OH) of the graphite surface, rendering that surface hydrophobic. Preferably, the organic liquid is a silanizing agent, which coating after drying is covered with a hydrophobic layer or membrane that is preferably a polyvinylchloride (PVC) plastic. For an ion-selective electrode, an ion sensor for the ion to be sensed is mixed in the membrane material coated over the hydrophobized graphite and in another embodiment for an internal reference electrode, a hydrophilic membrane containing pairs of a same chemical specie in differing oxidation states or redox couple can be sandwiched therebetween.

4251470, Feb 17, 1981

Oct 26, 1979

6/088698

Jeffrey D. Owen - Salt Lake City UT
Harold M. Brown - Salt Lake City UT

University of Utah - Salt Lake City UT

C07F 909

260990

An improved electroactive material for solid state, Ca. sup. ++ sensitive electrodes comprising highly purified di-[p-(1,1,3,3-tetramethylbutyl)phenyl] phosphoric acid or the corresponding calcium salt thereof.