This inventor holds 2 USPTO granted patents. Top assignees: Merck Patent Gesellschaft MIT Beschraenkter Haftung, Merck Patent Gesellschaft MIT Beschrankter Haftung. Active years: 1977-1978.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
1 out of 100 
1 out of 1,248 
Years Active: 1977-1978
Title: Johannes Ripphahn: Patents in Liquid Delivery and Thin-Layer Chromatography
Introduction
Johannes Ripphahn is an inventor associated with Darmstadt, Germany. His recorded inventions address reproducible liquid delivery and separating materials for thin-layer chromatography. He is credited with 2 patents.
Latest Patents
Ripphahn’s listed patents include “Device for the Repeated Reproducible Delivery of Definite Variable” and “Separating Material for Thin Layer Chromatography.”
The first patent describes a combined micrometer screw and syringe assembly designed to deliver predetermined variable volumes of liquid repeatedly and reproducibly. Its settings allow the syringe’s full volume to be made available for rinsing and cleaning without changing the selected delivery amount.
The second patent concerns a thin-layer chromatography separating material. It comprises an inert substrate coated with a sorption agent consisting essentially of silica gel particles about 3 to 8 micrometers in diameter, in a layer 100 to 300 micrometers thick.
Career Highlights
Ripphahn is associated with Merck Patent Gesellschaft mit beschränkter Haftung, also listed under the spelling Merck Patent Gesellschaft mit Beschraenkter Haftung. The available information connects his patent work with technologies for laboratory liquid handling and chromatographic separation.
Collaborations
His listed coworkers include Ernst Kriegbaum and Herbert Halpaap.
Conclusion
Johannes Ripphahn’s two recorded patents reflect practical contributions to precise, repeatable liquid dispensing and thin-layer chromatography materials.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile