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For the Inventor, By the Inventor

Menlo Park, CA, United States of America

Virobay, Inc.


USPTO Granted Patents = 22

% Expired Patents = 31.8



Forward Citations = 33

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23 inventors (with patents filed for the assignee):

goldMedal John O Link (13 out of 99 patents)

silverMedal Michael Graupe (7 out of 76 patents)

bronzeMedal Soon Hyung Woo (7 out of 12 patents)

4.  Craig J Mossman (6 out of 8 patents)

5.  Michael G Roepel (4 out of 7 patents)

6.  Jie Liu (3 out of 31 patents)

7.  Chandrasekar Venkataramani (2 out of 61 patents)

8.  Jeffrey Dener (2 out of 2 patents)

9.  Leslie Jean Holsinger (2 out of 4 patents)

10.  Sheila M Zipfel (1 out of 45 patents)

11.  In Jong Kim (1 out of 44 patents)

12.  Robert Booth (1 out of 4 patents)

13.  Jie Liu (1 out of 54 patents)

14.  Jiayao Li (1 out of 25 patents)

15.  Randall W Vivian (1 out of 23 patents)


22 patents:

1. 8748649 - Di-fluoro containing compounds as cysteine protease inhibitors (2014-06-10),
2. 8680152 - Cathepsin inhibitors for the treatment of bone cancer and bone cancer pain (2014-03-25),
3. 8518874 - HCV inhibitors (2013-08-27),
4. 8450373 - Alpha ketoamide compounds as cysteine protease inhibitors (2013-05-28),
5. 8431733 - Process for the preparation of (3S)-3-amino-N-cyclopropyl-2-hydroxyalkanamide derivatives (2013-04-30),
6. 8367732 - Di-fluoro containing compounds as cysteine protease inhibitors (2013-02-05),
7. 8324417 - [object Object] (2012-12-04),
8. 8211897 - Inhibitors of cathepsin B (2012-07-03),
9. 8163735 - Sulfonamide compounds as cysteine protease inhibitors (2012-04-24),
10. 8143448 - Process for the preparation of (3S)-3-amino-N-cyclopropyl-2-hydroxyalkanamide derivatives (2012-03-27),
11. 8106059 - Substituted pyrazines that inhibit protease cathepsin S and HCV replication (2012-01-31),
12. 8013186 - Haloalkyl containing compounds as cysteine protease inhibitors (2011-09-06),
13. 8013183 - Alpha ketoamide compounds as cysteine protease inhibitors (2011-09-06),
14. 7893112 - Di-fluoro containing compounds as cysteine protease inhibitors (2011-02-22),
15. 7893093 - Sulfonyl containing compounds as cysteine protease inhibitors (2011-02-22),
Company Overview
Virobay, Inc. is a biopharmaceutical company based in Menlo Park, California, focused on developing innovative therapies for serious diseases. The company specializes in the discovery and development of novel small molecule drugs that target specific disease pathways, particularly in the areas of immunology and oncology. Virobay's research leverages advanced chemistry and biology to create treatments aimed at improving patient outcomes and addressing unmet medical needs in the healthcare landscape.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 6 2026

22 Patents

#73 in Menlo Park, CA

#3,582 in California

#15,021 in US

#28,749 in the World

Menlo Park, CA (US)
Menlo Park, CA, United States of America

Virobay, Inc.

Forward Citations = 33

23 inventors:

goldMedal John O Link (13 out of 99 patents)

silverMedal Michael Graupe (7 out of 76 patents)

bronzeMedal Soon Hyung Woo (7 out of 12 patents)

4.  Craig J Mossman (6 out of 8 patents)

5.  Michael G Roepel (4 out of 7 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Virobay, Inc.. Retrieved from https://idiyas.com/company/virobay

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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