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For the Inventor, By the Inventor

CA

Qlt Phototherapeutics, Inc.

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USPTO Granted Patents = 15


Trademarks = 1

Forward Citations = 530

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31 inventors (with patents filed for the assignee):

goldMedal Julia G Levy (10 out of 46 patents)

silverMedal Anna M Richter (6 out of 25 patents)

bronzeMedal David W Hunt (4 out of 7 patents)

4.  Modestus O Obochi (4 out of 5 patents)

5.  Gustav Huber (3 out of 6 patents)

6.  Guillermo O Simkin (3 out of 6 patents)

7.  David H Dolphin (3 out of 42 patents)

8.  Agnes How-Ching Chan (3 out of 6 patents)

9.  H Andrew Strong (2 out of 13 patents)

10.  Mario Fsadni (2 out of 4 patents)

11.  Joseph Yan (2 out of 3 patents)

12.  Bushra J Agha (1 out of 3 patents)

13.  Kalidas Madhavrao Kale (1 out of 3 patents)

14.  Ethan D Sternberg (1 out of 16 patents)

15.  Ashok Jain (1 out of 4 patents)


15 patents:

1. 6107325 - Green porphyrins as immunomodulators (2000-08-22),
2. 6096776 - Green porphyrins as immunomodulators (2000-08-01),
3. 6086558 - Balloon catheter for photodynamic therapy (2000-07-11),
4. 6074666 - Liposome compositions of porphyrin photosensitizers (2000-06-13),
5. 6043237 - Use of photodynamic therapy for prevention of secondary cataracts (2000-03-28),
6. 6013053 - Balloon catheter for photodynamic therapy (2000-01-11),
7. 6008241 - Green porphyrins as immunomodulators (1999-12-28),
8. 5945439 - Method for destroying or inhibiting growth of unwanted cells or tissues (1999-08-31),
9. 5929105 - Ethylene glycol esters as photoactive agents (1999-07-27),
10. 5910510 - Vision through photodynamic therapy of the eye (1999-06-08),
11. 5883246 - Synthesis of polypyrrolic macrocycles from meso-substituted tripyrrane (1999-03-16),
12. 5882328 - Method to prevent transplant rejection (1999-03-16),
13. 5834503 - Methods to treat arterial plaque (1998-11-10),
14. 5756541 - Vision through photodynamic therapy of the eye (1998-05-26),
15. 5707608 - Methods of making liposomes containing hydro-monobenzoporphyrin (1998-01-13),
Company Overview
Qlt Phototherapeutics, Inc. is a biotechnology company based in California, specializing in the development of innovative photodynamic therapies. The organization focuses on harnessing light-activated compounds for therapeutic applications, particularly in the treatment of various medical conditions. With a commitment to advancing phototherapeutic technologies, Qlt aims to improve patient outcomes through its research and development efforts in the field of medical devices and treatments that leverage light for enhanced efficacy.
Profile summary synthesized from public USPTO records and patent filings.

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USPTO Data Jan 1 1976 - Oct 27 2026

15 Patents

#58 in

#985 in Canada

#39,991 in the World

CA
CA

Qlt Phototherapeutics, Inc.

Forward Citations = 530

31 inventors:

goldMedal Julia G Levy (10 out of 46 patents)

silverMedal Anna M Richter (6 out of 25 patents)

bronzeMedal David W Hunt (4 out of 7 patents)

4.  Modestus O Obochi (4 out of 5 patents)

5.  Gustav Huber (3 out of 6 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Qlt Phototherapeutics, Inc.. Retrieved from https://idiyas.com/company/qlt-phototherapeutics

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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