Last Updated: August 9, 2026

Details for Patent: 3,697,559

Name: Drug Patent Intelligence for US Patent 3697559
Creator: DrugPatentWatch
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Summary for Patent: 3,697,559

Title:	1,25-dihydroxycholecalciferol
Abstract:	1,25-Dihydroxycholecalciferol. The compound is characterized by antirachitic activity (vitamin D-like activity) and by its high activity in promoting intestinal calcium absorption indicating a more rapid onset of antirachitic activity.
Inventor(s):	Hector F De Luca, Heinrich K Schnoes, Michael F Holick
Assignee:	Wisconsin Alumni Research Foundation
Application Number:	US118881A
Patent Claim Types: see list of patent claims
Patent landscape, scope, and claims:	error: insufficient information More… ↓ ⤷ Start Trial

Drugs Protected by US Patent 3,697,559

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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

International Family Members for US Patent 3,697,559

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Country	Patent Number	Estimated Expiration	Supplementary Protection Certificate	SPC Country	SPC Expiration
Canada	962666	⤷ Start Trial
Germany	2209352	⤷ Start Trial
France	2126414	⤷ Start Trial
United Kingdom	1331011	⤷ Start Trial
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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