Took a few minutes to do some patent searches. It helps to know what one is looking. I was limited to the company name. Did not find the Bayer Chemical patents assigned to QMC. Are they held under subsidiary name?

I did find a 2017 issued patent and a later in 2017 patent application. I saved pdf copies.

There are many possible search parameters, if one has the patent number, or application number or published application number, inventor's exact name, and over a dozen other search parameters.

Continuous synthesis of high quantum yield InP/ZnS nanocrystals

United States Patent 9,577,149
Lu , et al. ISSUED: February 21, 2017
Continuous synthesis of high quantum yield InP/ZnS nanocrystals

Abstract

The invention relates to a continuous-flow synthesis process for the preparation of high quality indium phosphide/zinc sulfide core/shell semiconduting nanocrystals in particular quantum dots (QD) conducted in a micro-reaction system comprising at least one mixing chamber connected to one reaction chamber.
Inventors: Lu; Huachang (Cologne, DE), Hoheisel; Werner (Cologne, DE), Mleczko; Leslaw (Dormagen, DE), Nowak; Stephan (Cologne, DE)
Applicant:
Name City State Country Type

Quantum Materials Corporation
San Marcos
TX
US
Assignee: Quantum Materials Corporation (San Marcos, TX)
Family ID: 47222115
Appl. No.: 14/361,862
Filed: November 26, 2012
PCT Filed: November 26, 2012
PCT No.: PCT/EP2012/073552
371(c)(1),(2),(4) Date: May 30, 2014
PCT Pub. No.: WO2013/079423
PCT Pub. Date: June 06, 2013