This inventor holds 7 USPTO granted patents and 1 published patent application. Top assignees: Electric Power Research Institute Incorporated, Dexsil Corporation, General Electric Company. Active years: 1982-1993.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Van Nuys, CA (US) (1982)
- North Adams, MA (US) (1986 - 1993)
Company Filing History:
4 out of 994 
1 out of 10 
1 out of 52,387 
Years Active: 1982-1993
Title: The Innovative Contributions of David J Fisher
Introduction
David J Fisher is a notable inventor based in North Adams, MA (US), recognized for his significant contributions to the field of chemical testing. With a total of seven patents to his name, Fisher has developed innovative solutions that address critical challenges in detecting impurities in oil and measuring halogenated organic compounds in soil samples.
Latest Patents
One of Fisher's latest patents is a chemical test kit designed for detecting impurities in oil samples. This kit comprises two flexible translucent or transparent containers, each containing at least one breakable capsule. The first container allows for the separation of an aqueous layer from an oil layer, while the capsules contain reagents that extract impurities from the oil into the aqueous layer. The method involves introducing an oil sample into the first container, breaking the capsule, and transferring the aqueous layer to the second container, where a chemical reaction indicates the presence of impurities at a specified threshold concentration.
Another significant patent involves a method for measuring the content of halogenated organic compounds, such as polychlorinated biphenyls (PCBs), in soil samples. This method utilizes a disposable field test kit that contacts a weighted soil sample with a pre-mixture of water and an organic solvent. The process effectively extracts and analyzes the PCB content, providing accurate results through a color-change titration.
Career Highlights
Throughout his career, David J Fisher has worked with prominent organizations, including the Electric Power Research Institute and Dexsil Corporation. His work in these companies has contributed to advancements in chemical testing and environmental safety.
Collaborations
Fisher has collaborated with various professionals in his field, including his coworker Stephen R Finch, to enhance the development and application of his innovative testing methods.
Conclusion
David J Fisher's inventive spirit and dedication to improving chemical testing methods have made a lasting impact in his field. His patents reflect a commitment to innovation and environmental safety, showcasing his role as a significant contributor to modern scientific advancements.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile