This inventor holds 1 USPTO granted patent, plus 1 CIPO patent. Top assignee: Ciba-Geigy Corporation. Active years: 1991.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 1991
Title: Angelika Hayer: Inventor in Dye and Optical Brightener Processing
Introduction
Angelika Hayer is an inventor associated with Riehen, Switzerland. Her patent work concerns the preparation of durable granules containing dyes, fluorescent brighteners, or photoactivators. The record provided lists 1 patent in her name.
Latest Patents
Hayer’s listed patent, “Preparation of Granules of Dyes, Optical Whiteners or Photoactivators,” describes a spray-drying process for producing granules from an aqueous suspension with a solids content of at least 30%. The suspension contains a dye, fluorescent brightener, or photoactivator, along with a condensation product of naphthalenesulfonic acid and formaldehyde, and may include additional auxiliaries or diluents.
The process uses a feed pressure of 50–150 bar and produces granules with less than 4% residual moisture. The patent highlights the resulting granules’ resistance to pressure and abrasion.
Career Highlights
Hayer is associated with Ciba-Geigy Corporation and Ciba-Geigy AG. Her listed invention reflects work on spray-drying methods and the production of robust granules for dye-related applications.
Collaborations
The provided information names Wolfgang Rehmann and Konrad Neumann as Hayer’s coworkers.
Conclusion
Angelika Hayer’s recorded patent focuses on a spray-drying process designed to produce low-moisture, pressure-resistant, and abrasion-resistant granules for dyes, optical brighteners, and photoactivators.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile