Last Updated: November 8, 2026

Details for Patent: 6,294,572

Name: Drug Patent Intelligence for US Patent 6294572
Creator: DrugPatentWatch
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Summary for Patent: 6,294,572

Title:	Crystalline N-acetyl neuraminic acid derivatives and process for their preparation
Abstract:	Two useful crystal hydrates of 5-acetamido-2,3,4,5-tetradeoxy-4-guanidino-D-glycero-D-galacto-non-2-enopyranosonic acid have either a low or high aspect ratio. These crystalline N-acetyl neurominic acid derivatives are favored for pharmaceutical formulation because of their physical properties. For example, the low aspect ratio crystal has good flow properties, and the high aspect ratio crystal has a stable water content over time.
Inventor(s):	Christopher Williamson, William James White, Vipulkumar Patel
Assignee:	Biota Scientific Management Pty Ltd
Application Number:	US09/346,583
Patent Claim Types: see list of patent claims	Use; Composition; Formulation; Process;

Drugs Protected by US Patent 6,294,572

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

Foreign Priority and PCT Information for Patent: 6,294,572

Foriegn Application Priority Data
Foreign Country	Foreign Patent Number	Foreign Patent Date
United Kingdom	9325841	Dec 17, 1993

International Family Members for US Patent 6,294,572

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
African Regional IP Organization (ARIPO)	541	⤷ Start Trial
African Regional IP Organization (ARIPO)	9400705	⤷ Start Trial
African Regional IP Organization (ARIPO)	9600810	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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