This inventor holds 2 USPTO granted patents. Top assignee: Eisai Company, Limited. Active years: 1992-1999.
Location History:
- Ibaraki, JP (1992)
- Ibaraki Prefecture, JP (1999)
Company Filing History:
Years Active: 1992-1999
Title: Ichiro Yamakawa: Innovator in Drug Delivery Systems
Introduction
Ichiro Yamakawa is a prominent inventor based in Ibaraki, Japan. He has made significant contributions to the field of drug delivery systems, holding 2 patents that focus on innovative methods for producing drug-containing microspheres. His work is instrumental in enhancing the efficacy and release profiles of pharmaceutical compounds.
Latest Patents
Yamakawa's latest patents include a process for producing drug-containing microspheres by oil-in-water. This innovative method involves forming a drug into microspheres through an oil-on-water solvent evaporation process. The process utilizes a mixed solvent of at least one water-insoluble solvent and at least one water-miscible solvent. Additionally, fatty acids or their salts, along with glycerin fatty acid esters and/or propylene glycol fatty acid esters, are incorporated into the mixed solvent. The oil phase is emulsified with an aqueous phase to create an oil-in-water emulsion, which is then subjected to solvent evaporation to yield high-concentration drug-containing microspheres that release the drug slowly after administration.
Another notable patent is the multilayer sustained release granule. This invention comprises a core, a slow-release layer, and a rapid-release layer positioned outside the slow-release layer. A film layer containing a metal stearate is deposited between the two layers. This design allows for the prolonged discharge of pharmacologically effective components, enhancing the therapeutic effects of the medication.
Career Highlights
Ichiro Yamakawa is associated with Eisai Company, Limited, a leading pharmaceutical company known for its commitment to research and development in the healthcare sector. His work at Eisai has allowed him to focus on innovative drug delivery systems that improve patient outcomes.
Collaborations
Yamakawa has collaborated with notable colleagues such as Sumio Watanabe and Yasuo Miyake. Their combined expertise has contributed to advancements in the field of pharmaceutical sciences.
Conclusion
Ichiro Yamakawa's contributions to drug delivery systems through his innovative patents have the potential to significantly impact the pharmaceutical industry. His work exemplifies the importance of research and collaboration in developing effective medical solutions.