This inventor holds 7 USPTO granted patents. Top assignees: Synergen Associates, Inc., Zeagen, Inc., Universal Foods Corporation. Active years: 1987-1995.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Arvada, CO (US) (1987)
- Boulder, CO (US) (1992 - 1994)
- Longmont, CO (US) (1992 - 1995)
Company Filing History:
3 out of 3 
3 out of 3 
1 out of 22 Years Active: 1987-1995
Title: The Innovations of Donald L. Heefner
Introduction
Donald L. Heefner is a notable inventor based in Longmont, Colorado. He has made significant contributions to the field of biotechnology, particularly in the production of valuable compounds through microbial processes. With a total of 7 patents, Heefner's work has had a considerable impact on various industries.
Latest Patents
One of Heefner's latest patents is focused on a carotenoid-producing culture using Nospongiococcum excentricum. This culture is designed for the production of xanthophylls and has a dry cell weight xanthophyll content of at least about 0.65%. It is capable of growing to a cell density of greater than about 40 grams per liter. The culture comprises essential nutrients such as carbon, phosphate, sulfate, iron, magnesium, and nitrogen. Another significant patent involves a process for making L-phenyl acetyl carbinol (PAC). In this process, mutations are induced in microorganisms selected from the species Saccharomyces cerevisiae or Candida flareri. The resulting mutants are cultured in the presence of fermentation inhibitors to form colonies resistant to these inhibitors. Cells from these colonies are isolated and tested for their yield of PAC, which is useful as an intermediate in the preparation of well-known medicinal chemicals.
Career Highlights
Throughout his career, Heefner has worked with various companies, including Synergen Associates, Inc. and Zeagen, Inc. His innovative approaches and research have contributed to advancements in biotechnology and pharmaceuticals.
Collaborations
Heefner has collaborated with notable individuals in his field, including Michael J. Yarus and Linda A. Burdzinski. These collaborations have further enhanced his research and development efforts.
Conclusion
Donald L. Heefner's contributions to biotechnology through his patents and collaborations highlight his role as an influential inventor. His work continues to pave the way for advancements in the production of valuable compounds.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile