% Expired Patents = 33.3

CIPO Patents = 1

EPO Patents = 8

Trademarks = 2

Forward Citations = 3

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10 inventors (with patents filed for the assignee):

Richard W Wagner (5 out of 33 patents)

Matthew Clark (4 out of 14 patents)

Anthony Dominic Keefe (4 out of 12 patents)

4. Ying Victor Zhang (3 out of 10 patents)

5. John William Cuozzo (3 out of 4 patents)

6. Alexander Litovchick (2 out of 6 patents)

7. Diana Gikunju (2 out of 2 patents)

8. Heather Thomson (2 out of 2 patents)

9. Paolo A Centrella (1 out of 6 patents)

10. Christopher D Hupp (1 out of 1 patent)

11. John W Cuozzo (1 patent)

12. Ying Zhang (101 patents)

13. Anthony D Keefe (0 patent)

14. Anthony D Keefe (0 patent)

15. John Cuozzo (0 patent)

6 patents: Sort by Forward Citations

1. 11674135 - DNA-encoded libraries having encoding oligonucleotide linkages not readable by polymerases (2023-06-13),

2. 11168321 - Methods of creating and screening DNA-encoded libraries (2021-11-09),

3. 10865409 - Methods for tagging DNA-encoded libraries (2020-12-15),

4. 9394296 - Tryptoline derivatives having kinase inhibitory activity and uses thereof (2016-07-19),

5. 9394256 - Benzhydrol-pyrazole derivatives having kinase inhibitory activity and uses thereof (2016-07-19),

6. 9359601 - Methods of creating and screening DNA-encoded libraries (2016-06-07),

Company Overview

X-chem, Inc. is a leading chemical manufacturing company specializing in custom synthesis and toll manufacturing services for the pharmaceutical, biotech, and specialty chemical industries. With state-of-the-art facilities and a team of experienced chemists, X-chem delivers high-quality products to its clients globally. The company is known for its commitment to innovation, quality, and customer satisfaction.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

6 Patents

#168 in Waltham, MA

#2,545 in Massachusetts

#44,981 in US

Waltham, MA, United States of America

X-Chem, Inc.

Forward Citations = 3

10 inventors:

Richard W Wagner (5 out of 33 patents)

Matthew Clark (4 out of 14 patents)

Anthony Dominic Keefe (4 out of 12 patents)

4. Ying Victor Zhang (3 out of 10 patents)

5. John William Cuozzo (3 out of 4 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: X-Chem, Inc.. Retrieved from https://idiyas.com/company/x-chem

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]

1 patent (CIPO):

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]

8 patents (EPO):

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]