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Last Updated: January 28, 2020

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Details for Patent: 4,092,315

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Summary for Patent: 4,092,315
Title: Novel crystalline forms of prazosin hydrochloride
Abstract:The invention relates to novel and valuable crystalline forms of the hypotensive agent prazosin hydrochloride. The anhydrous .alpha.-form is preferred because it is relatively non-hygroscopic and hence possesses important advantages in handling and formulation. The polyhydrate form of prazosin hydrochloride is preferred because of its low, uniform rate of dissolution.
Inventor(s): Bianco; Ernest J. (Niantic, CT)
Assignee: Pfizer Inc. (New York, NY)
Application Number:05/662,937
Patent Claim Types:
see list of patent claims
Compound; Process;

Drugs Protected by US Patent 4,092,315

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

International Family Members for US Patent 4,092,315

Country Patent Number Estimated Expiration Supplementary Protection Certificate SPC Country SPC Expiration
Argentina 210937   Start Trial
Australia 2244377   Start Trial
Australia 506937   Start Trial
Belgium 851878   Start Trial
Bulgaria 29724   Start Trial
Canada 1068269   Start Trial
>Country >Patent Number >Estimated Expiration >Supplementary Protection Certificate >SPC Country >SPC Expiration

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