This inventor holds 8 USPTO granted patents. Top assignees: Polaroid Corporation, Other. Active years: 1976-1983.
Location History:
- Newton Centre, MA (US) (1979)
- Newton, MA (US) (1980)
- Newton Center, MA (US) (1976 - 1983)
Company Filing History:
7 out of 2,176 
1 out of 834,453 Years Active: 1976-1983
Title: Henry Bader: Innovator in Chemical Synthesis
Introduction
Henry Bader is a notable inventor based in Newton Center, MA (US). He has made significant contributions to the field of chemical synthesis, holding a total of 8 patents. His work focuses on innovative methods for preparing various chemical compounds.
Latest Patents
Among his latest patents is a method for preparing salts of 6-chloropurine. This novel method involves reacting hypoxanthine with phosphorus oxychloride in the presence of an organic base to form 6-chloropurine. A solvent is then added to the reaction mixture, which is subsequently reacted with a strong acid to create a 6-chloropurine salt that can be isolated. In preferred embodiments, the 6-chloropurine is freed from the salt using water, often in the presence of a base. Additionally, he has developed a process for synthesizing 4-aminopyrazolo(3,4-d)pyrimidine, where 3-amino-4-cyanopyrazole is reacted with formamidine or its salt at elevated temperatures.
Career Highlights
Henry Bader has worked with several prominent companies throughout his career, including Polaroid Corporation. His innovative approaches have contributed to advancements in chemical synthesis and have been recognized within the industry.
Collaborations
He has collaborated with notable individuals such as Michael H. Feingold and John W. Sparks, enhancing the impact of his work through teamwork and shared expertise.
Conclusion
Henry Bader's contributions to chemical synthesis through his patents and collaborations highlight his role as an influential inventor. His innovative methods continue to advance the field and inspire future research.