Koji Doi

This inventor holds 14 USPTO granted patents. Top assignees: Senju Pharmaceutical Co., Ltd., Yoshitomi Pharmaceutical Industries, Ltd.. Active years: 1991-2013.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Koji Doi. Retrieved from https://idiyas.com/inventor/koji-doi-mv855h9x

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

USPTO Granted Patents = 14

% Patents Active = 78.6

Average Co-Inventor Count = 2.5

ph-index = 5

Forward Citations = 125(Granted Patents)

Location History:

Suita, JP (1991)
Kobe, JP (1999 - 2013)

Company Filing History:

14 out of 229

Senju Pharmaceutical Co., Ltd.

patents

2 out of 198

Yoshitomi Pharmaceutical Industries, Ltd.

patents

where one patent can have more than one assignee

Years Active: 1991-2013

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14 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 8450295 - Ophthalmic composition containing xanthan gum and amino acid (2013-05-28),

2. 7998942 - Eye drop preparation comprising xanthan gum and terpenoid (2011-08-16),

3. 7939511 - Ophthalmic composition containing xanthan gum and amino acid (2011-05-10),

4. 7875271 - Ophthalmic composition comprising xanthan gum and glucose (2011-01-25),

5. 6545058 - Ophthalmic compositions for soft contact lens, method of enhancing wettability of soft contact lens, and method of inhibiting terpenoid adsorption (2003-04-08),

6. 6479556 - Ophthalmic compositions for soft contact lens, method of enhancing wettability of soft contact lens and method of inhibiting terpenoid adsorption (2002-11-12),

7. 6432893 - Method for removal of protein from contact lenses (2002-08-13),

8. 6368616 - Aqueous suspension for nasal administration of loteprednol (2002-04-09),

9. 5994405 - Agent for contact lenses (1999-11-30),

10. 5908865 - Chlorhexidine gluconate-containing, stabilized aqueous pharmaceutical (1999-06-01),

11. 5889030 - Method for stabilizing pranoprofen and stable liquid preparation of (1999-03-30),

12. 5856345 - Method for stabilizing pranoprofen and stable liquid preparation of (1999-01-05),

13. 5055304 - Stabilized pharmaceutical composition and method of producing same (1991-10-08),

14. 5017564 - Solid pharmaceutical preparation and method of producing same (1991-05-21),

Title: The Innovative Contributions of Koji Doi

Koji Doi is a prominent inventor based in Kobe, Japan, known for his significant contributions to ophthalmic compositions. With a total of 14 patents to his name, Doi has made remarkable advancements in the field of eye care.

Latest Patents

Doi's latest patents include an ophthalmic composition containing xanthan gum and amino acid. This invention provides an ophthalmic composition that has a superior corneal epithelial disorder-treating effect and a superior corneal epithelial cell-protecting effect. Another notable patent is an eye drop preparation comprising xanthan gum and terpenoid. This invention offers an ophthalmic solution that shows a suppressed decrease in the terpenoid content by the addition of xanthan gum.

Career Highlights

Throughout his career, Koji Doi has worked with reputable companies such as Senju Pharmaceutical Co., Ltd. and Yoshitomi Pharmaceutical Industries, Ltd. His work in these organizations has contributed to the development of innovative solutions in the pharmaceutical industry.

Collaborations

Doi has collaborated with notable individuals in his field, including Hiroshi Aki and Takuya Nakajima. These collaborations have further enhanced his research and development efforts.

Conclusion

Koji Doi's innovative work in ophthalmic compositions has made a significant impact on eye care. His patents reflect his dedication to improving treatments for corneal disorders and protecting corneal epithelial cells.

Profile summary based on public USPTO records.

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]