Brian G. Hansen
Engineers at 55 St, Boulder, CO

4970093, Nov 13, 1990

Apr 12, 1990

7/507829

Robert E. Sievers - Boulder CO
Brian N. Hansen - Boulder CO

University of Colorado Foundation - Boulder CO

B05D 306

427 38

A method for depositing a film of a desired material on a substrate comprises dissolving at least one reagent in a supercritical fluid comprising at least one solvent. Either the reagent is capable of reacting with or is a precursor of a compound capable of reacting with the solvent to form the desired product, or at least one additional reagent is included in the supercritical solution and is capable of reacting with or is a precursor of a compound capable of reacting with the first reagent or with a compound derived from the first reagent to form the desired material. The supercritical solution is expanded to produce a vapor or aerosol and a chemical reaction is induced in the vapor or aerosol so that a film of the desired material resulting from the chemical reaction is deposited on the substrate surface. In an alternate embodiment, the supercritical solution containing at least one reagent is expanded to produce a vapor or aerosol which is then mixed with a gas containing at least one additional reagent. A chemical reaction is induced in the resulting mixture so that a film of the desired material is deposited.

5301664, Apr 12, 1994

Mar 6, 1992

7/846331

Robert E. Sievers - Boulder CO
Brooks M. Hybertson - Boulder CO
Brian N. Hansen - Boulder CO

A61M 1500, B65D 3700

12820023

Methods and apparatus for delivering physiologically active compounds to a target human or animal employ a supercritical fluid solution comprising a supercritical fluid solvent and a physiologically active solute. The supercritical fluid solution is passed into a subcritical region to evaporate the solvent and form a gas-borne dispersion of solute particles. The gas-borne dispersion of solute particles is administered directly to the target human or animal. The apparatus for delivering the physiologically active compound are of the hand-held type.

6090267, Jul 18, 2000

Jul 17, 1998

9/118023

Brian N. Hansen - Boulder CO
Arnold E. Williams - Boulder CO

Timberline Instruments, Inc. - Boulder CO

G01N 27404, G01N 2706

2057805

Methods for determining the amount of volatile electrolyte present in an aqueous liquid sample comprise transferring the electrolyte from the aqueous liquid sample to an absorber solution across a gas-permeable membrane which is non-passable to the aqueous liquid sample and measuring the change in electrical conductivity of the absorber solution during the transfer period. The absorber solution contains a solute which enhances the transfer of the electrolyte. Apparatus for conducting such methods include an absorber solution containing a solute which enhances the transfer of the electrolyte.