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For the Inventor, By the Inventor

Cupertino, CA, United States of America

Durect Corporation


USPTO Granted Patents = 93

% Expired Patents = 61.3



Trademarks = 1

Forward Citations = 2,626

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103 inventors (with patents filed for the assignee):

goldMedal Su Il Yum (29 out of 91 patents)

silverMedal John W Gibson (25 out of 36 patents)

bronzeMedal Arthur J Tipton (18 out of 43 patents)

4.  Felix T Theeuwes (17 out of 261 patents)

5.  Roger Fu (15 out of 15 patents)

6.  Michael S Zamloot (15 out of 22 patents)

7.  Huey-Ching Su (14 out of 15 patents)

8.  John Middleton (13 out of 27 patents)

9.  Grant Schoenhard (12 out of 13 patents)

10.  Guohua Chen (11 out of 42 patents)

11.  Wendy Chao (9 out of 10 patents)

12.  WeiQi Lin (7 out of 8 patents)

13.  James E Brown (7 out of 13 patents)

14.  Michael H Arenberg (7 out of 8 patents)

15.  Keith Edward Branham (7 out of 12 patents)


Core Competencies:
Sustained Release
Transdermal Systems
Oral Dosage Forms
Controlled Release
Injectable Compositions
Depot Formulations
Polymer Complexes
Oxygenated Cholesterol
High Viscosity Liquids
Rheological Modifiers
Therapeutic Agents
Non-Aqueous Vehicles

93 patents:

1. 12433877 - Sustained release drug delivery systems and related methods (2025-10-07),
2. 12226423 - Compositions comprising 5-cholesten-3, 25-diol, 3-sulfate (25HC3S) or pharmaceutically acceptable salt thereof and at least one cyclic oligosaccharide (2025-02-18),
3. 11771624 - Sustained release drug delivery systems with reduced impurities and related methods (2023-10-03),
4. 11612609 - Uses of oxygenated cholesterol sulfates (OCS) (2023-03-28),
5. 11529420 - Pharmaceutically active agent complexes, polymer complexes, and compositions and methods involving the same (2022-12-20),
6. 11406646 - Compositions comprising 5-cholesten-3, 25-diol, 3-sulfate (25HC3S) or pharmaceutically acceptable salt thereof and at least one cyclic oligosaccharide (2022-08-09),
7. 11400019 - Sustained release drug delivery systems with reduced impurities and related methods (2022-08-02),
8. 11285217 - Compositions and methods involving polymer, solvent, and high viscosity liquid carrier material (2022-03-29),
9. 11179326 - Short duration depot formulations (2021-11-23),
10. 11083796 - Peroxide removal from drug delivery vehicle (2021-08-10),
11. 10786517 - Uses of oxygenated cholesterol sulfates (OCS) (2020-09-29),
12. 10758623 - Pharmaceutically active agent complexes, polymer complexes, and compositions and methods involving the same (2020-09-01),
13. 10682340 - Depot formulations (2020-06-16),
14. 10668011 - Depot formulations (2020-06-02),
15. 10603312 - Transoral dosage forms comprising sufentanil (2020-03-31),
Company Overview
Durect Corporation, based in Cupertino, California, specializes in innovative drug delivery systems aimed at improving therapeutic outcomes. The company focuses on developing advanced technologies such as sustained release and transdermal systems, as well as oral dosage forms and injectable compositions. Durect's expertise extends to depot formulations and polymer complexes, with a particular interest in oxygenated cholesterol, positioning it as a key player in the pharmaceutical landscape dedicated to enhancing patient care through effective drug delivery solutions.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 13 2026

Durect Corporation USPTO Patent Assignee Logo
93 Patents

#6 in Cupertino, CA

#943 in California

#4,029 in US

#8,291 in the World

Cupertino, CA (US)
Cupertino, CA, United States of America

Durect Corporation

Forward Citations = 2,626

103 inventors:

goldMedal Su Il Yum (29 out of 91 patents)

silverMedal John W Gibson (25 out of 36 patents)

bronzeMedal Arthur J Tipton (18 out of 43 patents)

4.  Felix T Theeuwes (17 out of 261 patents)

5.  Roger Fu (15 out of 15 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Durect Corporation. Retrieved from https://idiyas.com/company/durect

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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