US Patent

US11845867 — Process for the preparation of indigotindisulfonate sodium (indigo carmine)

Composition of Matter · Assigned to Provepharm Life Solutions SA · Expires 2036-11-25 · 11y remaining

Vulnerability score 17/100 Ironclad — strong claim type, well-established, deep family

What this patent protects

This patent protects an improved method for preparing highly or substantially pure indigotindisulfonate sodium, also known as indigo carmine.

USPTO Abstract

This invention relates to an improved method for the preparation of highly or substantially pure Indigotindisulfonate sodium (1). It further relates to the novel crystalline form I of Indigotindisulfonate sodium (1) and the process for its preparation.

Drugs covered by this patent

indigotindisulfonate-sodium (INDIGOTINDISULFONATE SODIUM)

Patent Metadata

Patent number: US11845867
Jurisdiction: US
Classification: Composition of Matter
Expires: 2036-11-25
Drug substance claim: Yes
Drug product claim: No
Assignee: Provepharm Life Solutions SA
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.

Track this patent

Get a daily-checked alert when vulnerability score, expiry, classification, or assignee changes. Email, Slack, or Teams delivery. Pro: 50 watches, Free: 3.