Robert William Wheeler

US Patent:

44169841, Nov 22, 1983

Filed:

May 22, 1981

Appl. No.:

6/266184

Inventors:

Robert P. Wheeler - Keene NH

Assignee:

Concord Laboratories, Inc. - Keene NH

International Classification:

C12Q 122
C12M 100
C12M 124
C12M 118

US Classification:

435 31

Abstract:

A sterilization indicator for testing the effectiveness of a sterilization process and a sterilization process using such an indicator are described. The indicator comprises a first compartment having at least one open end; a gas-permeable, bacteria-impermeable closure covering said open end; said first compartment containing a number of viable microorganisms that are resistant to a related sterilization process; a second compartment moveable with respect to said first compartment; said second compartment having a predetermined quantity of nutrient medium for promoting the growth of said microorganisms; separation means for sealing the nutrient medium in said second compartment; communications means for providing communication between said first compartment and said second compartment when it is desired to contact said microorganisms with said nutrient medium; and a detector composition contained in one of said compartments that is capable of undergoing a detectable change in response to the growth of said microorganisms.

US Patent:

45967733, Jun 24, 1986

Filed:

Sep 30, 1983

Appl. No.:

6/537794

Inventors:

Robert P. Wheeler - Keene NH

Assignee:

Concord Laboratories, Inc. - Keene NH

International Classification:

C12Q 122
C12M 100
C12M 138
C12M 124

US Classification:

435 31

Abstract:

A sterilization indicator for testing the effectiveness of a sterilization process and a sterilization process using such an indicator are described. The indicator includes a container for holding a number of viable microorganisms and a quantity of nutrient medium; a separation member that prevents the nutrient medium from contacting the microorganisms; a penetration member that penetrates the separation member to allow the nutrient medium to contact the microorganisms and a cap, coupled to the penetration member, to seal the microorganisms and nutrient medium within the container.

US Patent:

44391846, Mar 27, 1984

Filed:

May 3, 1982

Appl. No.:

6/373867

Inventors:

Robert P. Wheeler - Keene NH

Assignee:

Concord Laboratories, Inc. - Keene NH

International Classification:

A61M 500

US Classification:

604 90

Abstract:

A syringe for delivering two separated bodies of fluid comprising: a first piston for separating the two bodies of fluid; a second piston for pushing the two bodies of fluid out of the syringe; and a fluid chamber having a no-pass zone in which the pistons can slide and which has a cross section that each of the pistons substantially fills, preventing the passing of fluid around the pistons when they are in the no-pass zone, an output zone to direct fluid pushed out of the syringe by the pistons, and a bypass zone, for receiving the first piston, which connects the no-pass and output zones and which has a cross section that the first piston is unable to fill, so that when the first piston enters the bypass zone the fluid between the first and second pistons can pass around the first piston to the output zone. In a preferred embodiment the bypass zone has ridges projecting in from its wall, which push portions of the first piston away from that wall, allowing fluid to flow around the first piston; the output portion forms a nozzle designed to fit into, and make a seal with, a urethra; and the two bodies of fluid are a lubricating antiseptic and a lubricating anesthetic for use in preparing a patient for catheterization.