Steven Michael Walters

US Patent:

6940590, Sep 6, 2005

Filed:

Dec 11, 2002

Appl. No.:

10/316188

Inventors:

Steven J. Walters - Ellicott City MD, US

Assignee:

Sensors for Medicine and Science, Inc. - Germantown MD

International Classification:

G01J001/42
G01N021/01

US Classification:

356218, 356436, 436164, 436165, 436527, 436172, 422 8205, 422 8208, 422 8211, 25022714, 2504581, 2504591

Abstract:

An optical sensor device for determining the presence or concentration of an analyte, contains a waveguide disposed over a light source and a light detector mounted on a surface of a substrate and separated by an internal baffle, wherein the waveguide has a thickness corresponding to a far field emission point of the light source as determined by a light shielding baffle between the light source and light detector. An analyte indicator matrix is disposed on the outer surface of the waveguide. The sensor device geometry takes advantage of only direct illumination of the indicator matrix, and direct collection of indicator matrix illumination, without any significant reflection by said waveguide. Undesirable light noise generated by the light source passes directly out of the device through the waveguide.

US Patent:

7190445, Mar 13, 2007

Filed:

Jun 24, 2005

Appl. No.:

11/165129

Inventors:

Steven J. Walters - Ellicott City MD, US

Assignee:

Sensors for Medicine and Science, Inc. - Germantown MD

International Classification:

G01J 1/42
G01N 21/01

US Classification:

356218, 356436, 356244, 2504581, 436164, 436527, 422 8205

Abstract:

An optical sensor device for determining the presence or concentration of an analyte, contains a waveguide disposed over a light source and a light detector mounted on a surface of a substrate and separated by an internal baffle, wherein the waveguide has a thickness corresponding to a far field emission point of the light source as determined by a light shielding baffle between the light source and light detector. An analyte indicator matrix is disposed on the outer surface of the waveguide. The sensor device geometry takes advantage of only direct illumination of the indicator matrix, and direct collection of indicator matrix illumination, without any significant reflection by said waveguide. Undesirable light noise generated by the light source passes directly out of the device through the waveguide.

US Patent:

20060282042, Dec 14, 2006

Filed:

Jun 7, 2006

Appl. No.:

11/447980

Inventors:

Steven Walters - Ellicott City MD, US
Casey O'Connor - Gaithersburg MD, US

Assignee:

Sensors for Medicine and Science, Inc. - Germantown MD

International Classification:

A61M 5/178
A61F 13/20

US Classification:

604164010, 604015000, 604038000

Abstract:

The present invention provides an insertion device and method for implanting a biosensor into a patient subject. In one embodiment, a biosensor is stored in the instrument's hydration chamber which enables the biosensor to maintain proper hydration and sterilization prior to insertion. The instrument further includes a plunger that travels along a channel within the support device. After the biosensor is placed into the channel, the user pushes the plunger causing the biosensor to move through the channel and a hollow tube and into the patient subject. The present invention also provides for packaging and storing a biosensor and insertion device so that the biosensor is hydrated and sterile prior to insertion.