Stephen A Charles

This inventor holds 22 USPTO granted patents and 11 published patent applications, plus 1 CIPO patent and 12 EPO patents, primarily in Oncolytic Virus Therapy. Top assignees: Kodiak Sciences Inc., Nektar Therapeutics, Sator Therapeutics. Active years: 2011-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Stephen A Charles. Retrieved from https://idiyas.com/inventor/stephen-a-charles

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

Calculating rank

USPTO Granted Patents = 22 (Patent Applications = 11)

% Patents Active = 95.5

CIPO Patents = 1

EPO Patents = 12 (Patent Applications = 13)

Average Co-Inventor Count = 4.5

ph-index = 6

Forward Citations = 140(Granted Patents)

Location History:

Huntsville, AL (US) (2011 - 2014)
San Jose, CA (US) (2014 - 2020)
Chagrin Falls, OH (US) (2022)
Ravenna, OH (US) (2017 - 2023)

Company Filing History:

5. 1 out of 834,659

Other

patents

Years Active: 2011-2026

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Areas of Expertise:

Oncolytic Viruses

Dendritic Cells

Zwitterionic Polymers

Factor VIII

Polymer Conjugates

PDGF Antagonists

VEGF Antagonists

Pharmaceutical Compositions

Polymeric Reagents

Drug Conjugates

Targeted Drug Delivery

Atom Arrangements

22 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12606796 - Delivery of oncolytic viruses using dendritic cells (2026-04-21),

2. 12521424 - OPTIMIZED ONCOLYTIC VIRUSES AND USES THEREOF (2026-01-13),

3. 12357664 - Optimized oncolytic viruses and uses thereof (2025-07-15),

4. 12214044 - Factor VIII zwitterionic polymer conjugates (2025-02-04),

5. 11819531 - Multifunctional zwitterionic polymer conjugates (2023-11-21),

6. 11590235 - Factor VIII zwitterionic polymer conjugates (2023-02-28),

7. 11446385 - Polymer derivatives having particular atom arrangements (2022-09-20),

8. 11253558 - Optimized oncolytic viruses and uses thereof (2022-02-22),

9. 11155610 - Dual PDGF/VEGF antagonists (2021-10-26),

10. 11071771 - Butyrylcholinesterase zwitterionic polymer conjugates (2021-07-27),

11. 10702608 - Factor VIII zwitterionic polymer conjugates (2020-07-07),

12. 10646578 - Polymer derivatives having particular atom arrangements (2020-05-12),

13. 10363290 - Butyrylcholinesterase zwitterionic polymer conjugates (2019-07-30),

14. 9913913 - Method for preparing a polymeric reagent (2018-03-13),

15. 9840553 - Dual PDGF/VEGF antagonists (2017-12-12),

Title: Stephen A Charles: Innovator in Polymer Conjugates

Introduction

Stephen A Charles is a notable inventor based in San Jose, California, recognized for his contributions to the field of polymer science. With a remarkable portfolio of 19 patents, Charles has dedicated his career to advancing medical and pharmaceutical applications through innovative polymer conjugates.

Latest Patents

Among his latest inventions are significant advancements in the area of Factor VIII zwitterionic polymer conjugates. The present invention provides multi-armed high molecular weight polymers that incorporate hydrophilic groups conjugated to Factor VIII. This innovation is crucial for enhancing therapeutic efficacy in hemophilia treatment. Another noteworthy invention is related to multifunctional zwitterionic polymer conjugates. This patent describes random copolymers containing zwitterions and one or more functional agents, along with methods for their preparation, presenting exciting possibilities for targeted drug delivery and therapeutic applications.

Career Highlights

Charles has built an impressive career within competitive organizations such as Kodiak Sciences Inc. and Nektar Therapeutics. His expertise has contributed significantly to enhancing the capabilities of these companies, focusing on developing novel therapeutic solutions that leverage his polymer science expertise.

Collaborations

Throughout his career, Charles has collaborated with esteemed professionals like Wayne To and J. Milton Harris. These collaborations have fostered an environment of innovation, leading to groundbreaking research outcomes in the field of polymer conjugates and their applications in medicine.

Conclusion

In conclusion, Stephen A Charles exemplifies the spirit of innovation through his extensive patent portfolio and contributions to the field of polymer science. His work continues to inspire advancements in therapeutic applications, ensuring that patients benefit from the cutting-edge developments in medical science.

Profile summary based on public USPTO records.