Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10094809 | Specific analysis of ketone and aldehyde analytes using reagent compounds, labeling strategies, and mass spectrometry workflow | Subhakar Dey, Brian L. Williamson, Subhasish Purkayastha, Michal Weinstock | 2018-10-09 |
| 9257267 | Composition, method, and kit for calibrating a mass spectrometer | Subhakar Dey, Marjorie S. Minkoff, Subhasish Purkayastha, Brian L. Williamson | 2016-02-09 |
| 8975404 | Labeling reagents for analyte determination and methods and compounds used in making the same | Subhakar Dey, Subhasish Purkayastha, Darryl Pappin | 2015-03-10 |
| 8617898 | Quantitative analysis of vitamin D3, vitamin D2, and metabolites thereof | Subhakar Dey, Brian L. Williamson, Subhasish Purkayastha | 2013-12-31 |
| 8569304 | Active esters of N-substituted piperazine acetic acids, including isotopically enriched versions thereof | Subhakar Dey, Darryl Pappin, Subhasish Purkayastha, James M. Coull | 2013-10-29 |
| 8501498 | Mass tags for quantitative analyses | Xiongwei Yan, Pau Miau Yuan, Sylvia W. Yuen, Kuo-Liang Hsi, Joe Y. L. Lam +5 more | 2013-08-06 |
| 8236565 | Tagging reagents and methods for hydroxylated compounds | Subhasish Purkayastha, Subhakar Dey | 2012-08-07 |
| 7932388 | Isotopically enriched N-substituted piperazines and methods for the preparation thereof | Darryl Pappin, James M. Coull | 2011-04-26 |
| 7364911 | Methods for isolating and labeling sample molecules | Rudolf Aebersold, Huilin Zhou, Beate Rist, George J. Vella, Subhasish Purkayastha | 2008-04-29 |
| 7355045 | Isotopically enriched N-substituted piperazine acetic acids and methods for the preparation thereof | Subhakar Dey, Darryl Pappin, Subhasish Purkayastha, James M. Coull | 2008-04-08 |
| 7307169 | Isotopically enriched N-substituted piperazines and methods for the preparation thereof | Darryl Pappin, James M. Coull | 2007-12-11 |
| 7183116 | Methods for isolation and labeling of sample molecules | Rudolf Aebersold, Huilin Zhou, Beate Rist, George J. Vella, Subhasish Purkayastha | 2007-02-27 |