Last Updated: May 10, 2026

Details for Patent: 4,758,598

Name: Drug Patent Intelligence for US Patent 4758598
Creator: DrugPatentWatch
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Summary for Patent: 4,758,598

Title:	Solid shaped articles
Abstract:	Solid shaped articles, particularly pharmaceutical dosage forms, are prepared by freezing in a mould a composition comprising a predetermined amount of chemical (e.g. pharmaceutical) and a solution of carrier material and then subliming solvent from the frozen composition. The side wall or walls of the mould make an angle with the vertical of at least 5° at the surface of the composition. This enables shaped articles of constant thickness to be produced with minimum sublimation times.
Inventor(s):	George K. E. Gregory
Assignee:	John Wyeth and Brother Ltd
Application Number:	US06/850,430
Patent Claim Types: see list of patent claims	Composition; Formulation;

Drugs Protected by US Patent 4,758,598

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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: 4,758,598

Foriegn Application Priority Data
Foreign Country	Foreign Patent Number	Foreign Patent Date
United Kingdom	8136360	Dec 2, 1981

International Family Members for US Patent 4,758,598

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Argentina	229543	⤷ Start Trial
Austria	27058	⤷ Start Trial
Australia	554816	⤷ Start Trial
Australia	9061882	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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