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For the Inventor, By the Inventor

Charles City, IA, United States of America

Cambrex Charles City, Inc.


USPTO Granted Patents = 14

% Expired Patents = 64.3


Forward Citations = 61

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23 inventors (with patents filed for the assignee):

goldMedal Paul Alan Jass (6 out of 13 patents)

silverMedal Jason Scott Douglas (4 out of 4 patents)

bronzeMedal Pär Holmberg (3 out of 3 patents)

4.  Michael Robert Tracey (3 out of 4 patents)

5.  Matthew Wendell Schiesher (3 out of 3 patents)

6.  Zhiming Eric Dong (2 out of 2 patents)

7.  Todd Jeffrey Johnson (2 out of 2 patents)

8.  Greg S Buenger (2 out of 2 patents)

9.  John Allen Walling (2 out of 2 patents)

10.  Lars Eklund (1 out of 1 patent)

11.  David Adams (1 out of 1 patent)

12.  Michael Letourneau (1 out of 1 patent)

13.  Margus Eek (1 out of 1 patent)

14.  Alo Soone (1 out of 1 patent)

15.  Jan-Erling Bäckvall (1 out of 2 patents)


14 patents:

1. 11136331 - Methods of O-demethylation (2021-10-05),
2. 10370382 - Process for preparing hydromorphone and derivatives thereof (2019-08-06),
3. 9981979 - Process for the formation of hydrocodone bitatrate (2018-05-29),
4. 9981978 - Preparation of saturated ketone morphinan compounds by catalytic isomerisation (2018-05-29),
5. 8779191 - Methods and compositions for preparing lisdexamfetamine and salts thereof (2014-07-15),
6. 8614346 - Methods and compositions for preparation of amphetamine conjugates and salts thereof (2013-12-24),
7. 8299258 - Method of making piperidine derivatives (2012-10-30),
8. 8039621 - Process for preparing anhydrous Aripirazole type I (2011-10-18),
9. 7705184 - Method of making amphetamine (2010-04-27),
10. 7345191 - Process for preparation of probucol derivatives (2008-03-18),
11. 7294736 - Process for preparation of probucol derivatives (2007-11-13),
12. 7247744 - Process for the preparation of probucol derivatives (2007-07-24),
13. 6828336 - Nicotine-containing, controlled release composition and method (2004-12-07),
14. 6586449 - Nicotine-containing, controlled release composition and method (2003-07-01),
Company Overview
Cambrex Charles City, Inc. is a leading provider of small molecule active pharmaceutical ingredients (APIs) and intermediates, specializing in the development and manufacturing of complex chemical compounds for the pharmaceutical industry. The company focuses on delivering high-quality solutions across various stages of drug development, from early-stage research to commercial production. Located in Charles City, Iowa, Cambrex plays a vital role in supporting the global healthcare sector by enabling the production of essential medications.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

14 Patents

#1 in Charles City, IA

#133 in Iowa

#22,319 in US

#42,249 in the World

Charles City, IA (US)
Charles City, IA, United States of America

Cambrex Charles City, Inc.

Forward Citations = 61

23 inventors:

goldMedal Paul Alan Jass (6 out of 13 patents)

silverMedal Jason Scott Douglas (4 out of 4 patents)

bronzeMedal Pär Holmberg (3 out of 3 patents)

4.  Michael Robert Tracey (3 out of 4 patents)

5.  Matthew Wendell Schiesher (3 out of 3 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Cambrex Charles City, Inc.. Retrieved from https://idiyas.com/company/cambrex-charles-city

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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