David W Valentine

Address:

4121 39 St APT 4, San Diego, CA 92105

VIN:

3FAHP0JA5AR417112

Make:

FORD

Model:

FUSION

Year:

2010

US Patent:

20080224880, Sep 18, 2008

Filed:

Mar 13, 2007

Appl. No.:

11/685541

Inventors:

David Valentine - La Jolla CA, US

International Classification:

G08B 21/22

US Classification:

3406866

Abstract:

A sensor device () for a toilet having a seat moveable between a raised position and lowered position is provided. The sensor device () includes a housing () adapted to be removably coupled to the toilet and a controller () disposed within the housing (). The sensor device () further includes a motion sensor () in communication with the controller () and adapted to activate a first signal when the seat is in either the raised or lowered position and a user is positioned within a first predetermined range of the toilet.

US Patent:

20120036923, Feb 16, 2012

Filed:

Apr 23, 2010

Appl. No.:

13/264736

Inventors:

David Valentine - Goleta CA, US

Assignee:

THE REGENTS OF THE UNIVERSITY OF CALIFORNIA - Oakland CA

International Classification:

E21B 49/00

US Classification:

7315202

Abstract:

A method for determining the flux of methane newly generated through manipulation of a sub-surface environment. The method comprises: (a) measuring a baseline isotope ratio (R) in methane pre-existing in the reservoir; (b) manipulating the reservoir to facilitate biogenic production of new methane in the reservoir; (c) injecting a substance labeled with the isotope into the reservoir; (d) measuring a flux (F) and isotope ratio (R) of methane from the reservoir; (e) measuring an isotope ratio (R) of a methane precursor in a liquid or vapor sample at one or more time periods; and (f) calculating a flux (F) of the new methane from the reservoir according to an isotope mass balance, such as wherein α=isotope fractionation factor between the methane pre-cursor and the new methane.