Patent: 4,617,271

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Summary for Patent: 4,617,271

Title:	Process for producing immobilized L-asparaginase preparations for the therapy of leukemia
Abstract:	This invention relates to a process for producing immobilized L-asparaginase preparations. Its principal object is to produce immobilized L-asparaginase preparations which are excellent in antithrombogenicity and mechanical strength. The present invention is concerned with production of immobilized L-asparaginase preparations by pouring an aqueous solution containing 6% or more of a polyvinyl alcohol with a degree of hydrolysis of 97 mol. % or higher and a viscosity-average degree of polymerization of 1,800 or more an antileukemic asparaginase into a vessel or a mold of an appropriate shape, subjecting the solution to cooling, solidification and molding at a temperature of -15.degree. C. or lower and partially dehydrating the molded mass without thawing to a dehydration ratio of 5% by weight or more and, if desired, immersing the product in water. According to the invention, L-asparaginase can be embedded in a highly hydrous gel excellent in antithrombogenicity and mechanical strength by simple procedures.
Inventor(s):	Nambu; Masao (Yokohama, JP)
Assignee:	Nippon Oil Company, Limited (Tokyo, JP)
Application Number:	06/573,922
Patent Claims:	see list of patent claims

Details for Patent 4,617,271

Glossary

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Applicant	Tradename	Biologic Ingredient	Dosage Form	BLA	Number	Approval Date	Patent No.	Assignee	Estimated Patent Expiration	Status	Orphan	Source
Merck	ELSPAR	asparaginase	VIAL	101063	001	1978-01-10	⤷ Try it Free	Nippon Oil Company, Limited (Tokyo, JP)	2003-10-14	RX		search
>Applicant	>Tradename	>Biologic Ingredient	>Dosage Form	>BLA	>Number	>Approval Date	>Patent No.	>Assignee	>Estimated Patent Expiration	>Status	>Orphan	>Source

International Patent Family for US Patent 4,617,271

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Country	Patent Number	Estimated Expiration
World Intellectual Property Organization (WIPO)	8303763	⤷ Try it Free
Netherlands	8320115	⤷ Try it Free
Japan	S58183626	⤷ Try it Free
Switzerland	659393	⤷ Try it Free
>Country	>Patent Number	>Estimated Expiration

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