The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 18, 2015
Filed:
Jul. 26, 2011
Douglas Steven Baer, Menlo Park, CA (US);
Elena Simone Franklin Berman, Mountain View, CA (US);
Manish Gupta, Mountain View, CA (US);
David A. Wagner, Nashua, NH (US);
Daniel L. Bolt, Medford, MA (US);
Susan Lauren Fortson, Mountain View, CA (US);
Douglas Steven Baer, Menlo Park, CA (US);
Elena Simone Franklin Berman, Mountain View, CA (US);
Manish Gupta, Mountain View, CA (US);
David A. Wagner, Nashua, NH (US);
Daniel L. Bolt, Medford, MA (US);
Susan Lauren Fortson, Mountain View, CA (US);
Los Gatos Research, Mountain View, CA (US);
Abstract
Biological fluid samples containing proteins (e.g., blood plasma or saliva) are prepared for isotopic analysis by precipitating the proteins while leaving the isotopic ratio unaffected. This precipitation can involve adding metal ions, salts, organic solvents, or organic polymers. The sample is then centrifuged to allow transfer of the supernatant for isotopic analysis, e.g. by tunable diode laser absorption spectrometry to obtain a quantitative measure of theH andO isotope levels in the water relative to reference standards.