CA Patent

CA2100514C — 17-spiromethylene steroids

Assigned to Organon NV · Expires 2005-03-29 · 21y expired

What this patent protects

The invention relates to a steroid derivative which steroidal skeleton is bound at carbon atom 17 to a spiromethylene ring of the formula: <See formula I> wherein R a and R b are independently selected from the group consisting of hydrogen, methyl, and halogen; m is 1 o…

USPTO Abstract

The invention relates to a steroid derivative which steroidal skeleton is bound at carbon atom 17 to a spiromethylene ring of the formula: <See formula I> wherein R a and R b are independently selected from the group consisting of hydrogen, methyl, and halogen; m is 1 or 2; and the asterisk denotes carbon atom 2 of the spiromethylene ring which is carbon atom 17 (or carbon atom 17.alpha. of a homosteroid skeleton) of the steroid. The steroids have progestational or antiprogestational activity.

Drugs covered by this patent

Patent Metadata

Patent number
CA2100514C
Jurisdiction
CA
Classification
—
Expires
2005-03-29
Drug substance claim
No
Drug product claim
No
Assignee
Organon NV
Source
FDA Orange Book + USPTO grounding via Google Patents

Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.

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