This inventor holds 4 USPTO granted patents. Top assignees: Institute Guilfoyle, Analysts, Inc., Guilfoyle, Inc.. Active years: 1994-2001.
Location History:
- Watertown, MA (US) (1994)
- Clinton, MA (US) (1998)
- Leominster, MA (US) (2000 - 2001)
Company Filing History:
2 out of 5 
1 out of 2 
1 out of 1 Years Active: 1994-2001
Title: Innovations of John B Desjardins
Introduction
John B Desjardins is a notable inventor based in Leominster, MA (US). He holds a total of 4 patents that showcase his contributions to the field of engineering and technology. His work primarily focuses on the development of advanced apparatuses and methods that enhance fluid analysis.
Latest Patents
One of his latest patents is a ferrographic apparatus that incorporates a priming operation. This operation moves a priming fluid in a direction opposite to the flow direction of the sample fluid through a fluid pathway, including the flow chamber. The design facilitates the dissipation of gas bubbles introduced during the priming operation and minimizes the deposition of specimen material at unintended locations. The sample fluid is added to the reservoir to create a bubble-free interface with the priming fluid, and the movement direction through the flow chamber is reversed. This results in a continuous fluid column that advances through the fluid pathway, allowing the sample fluid to enter the flow chamber and pass through a magnetic field gradient before exiting through an orifice at the opposite end.
Career Highlights
Throughout his career, John B Desjardins has worked with various organizations, including the Institute Guilfoyle and Analysts, Inc. His innovative approaches have significantly impacted the field of ferrography and fluid analysis.
Collaborations
He has collaborated with notable individuals such as William W Seifert and Vernon C Westcott, contributing to advancements in their respective fields.
Conclusion
John B Desjardins is a distinguished inventor whose work in ferrographic technology has led to significant advancements in fluid analysis. His patents reflect his commitment to innovation and excellence in engineering.