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Serving leading biopharmaceutical companies globally:

Baxter
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Chubb
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Merck
Novartis
Argus Health
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Generated: January 19, 2018

DrugPatentWatch Database Preview

Details for Patent: 5,057,616

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Summary for Patent: 5,057,616
Title: Podophyllotoxin purification process
Abstract:Podophyllotoxin is recovered from podophyllum resin with improved efficiency by adsorbing impurities out of a solution using a solid adsorbent, preferably alumina. This improvement finds application in an overall process for purifying podophyllotoxin from podophyllum resin in which the podophyllotoxin is first crystallized from the podophyllum resin, the crystals so formed are dissolved and subjected to the solid adsorbent treatment, crystals are then recovered and optionally recrystallized and dried to give the desired product.
Inventor(s): Jennings; Rex A. (Holland, MI), Stearns; Jay F. (Santa Rosa, CA)
Assignee: Oclassen Pharmaceuticals, Inc. (San Rafael, CA)
Application Number:07/415,170
Patent Claim Types:
see list of patent claims
Compound; Process; Formulation;

Drugs Protected by US Patent 5,057,616

Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Patent Submitted
Applicant Tradename Generic Name Dosage NDA Approval Date TE Type RLD RS Patent No. Patent Expiration Product Substance Delist Req. Patented / Exclusive Use Patent Submitted

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Serving leading biopharmaceutical companies globally:

Harvard Business School
Chubb
Cipla
Johnson and Johnson
Teva
Julphar
Federal Trade Commission
Fish and Richardson
Daiichi Sankyo

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