EP Patent

EP0324426A2 — Process for forming super high contrast negative images

Assigned to Fujifilm Holdings Corp · Expires 1989-07-19 · 37y expired

What this patent protects

A process of forming super high contrast negative photographic materials in a developer having a pH of from 9.6 to 11.0 wherein the photographic material contains a hydrazine compound and a nucleation accelerator.

USPTO Abstract

A process of forming super high contrast negative photographic materials in a developer having a pH of from 9.6 to 11.0 wherein the photographic material contains a hydrazine compound and a nucleation accelerator.

Drugs covered by this patent

Patent Metadata

Patent number
EP0324426A2
Jurisdiction
EP
Classification
—
Expires
1989-07-19
Drug substance claim
No
Drug product claim
No
Assignee
Fujifilm Holdings Corp
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.