This inventor holds 3 USPTO granted patents. Top assignees: The University of Western Ontario, Fujitsu Corporation, I.c.s.t., the Institute for Chemical Science and Technology. Active years: 1992-1995.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
2 out of 160 
1 out of 39,374 
1 out of 1 Years Active: 1992-1995
Title: N Stewart McIntyre: Innovator in Polymer Powder Treatment
Introduction
N Stewart McIntyre is a notable inventor based in London, Canada. He has made significant contributions to the field of polymer science, particularly in the treatment of polymer powders. With a total of 3 patents to his name, McIntyre's work has advanced the understanding of triboelectric properties in polymers.
Latest Patents
One of McIntyre's latest patents focuses on the plasma treatment of polymer powders. This innovative process involves modifying the surfaces of fine polystyrene (PS) and polymethyl methacrylate (PMMA) powders through exposure to downstream products of nitrogen or oxygen microwave plasma. The research emphasizes the effects of nitrogen and indium incorporation on the powder surface, particularly regarding variations in triboelectric properties. X-ray photoelectron spectroscopy (XPS) was employed to analyze changes in surface elemental composition. The findings revealed that nitrogen plasma treatment led to the formation of amines in PS and imines and amides in PMMA. Additionally, oxygen plasma treatment resulted in the creation of hydroxyl and carbonyl groups on both PS and PMMA surfaces. The charge-to-mass ratio (Q/M) of the treated powders was measured using the cage blowoff method, and the surface charge density (Q/A) was calculated. The results indicated that the Q/A of nitrogen plasma-treated PS powder shifted towards positive charge with increased nitrogen concentration, while the Q/A of oxygen plasma-treated PS powder initially shifted towards negative charge but changed to positive with higher oxygen concentrations. The behavior of plasma-treated PMMA powder differed, showing less variation in Q/A compared to PS. These results suggest that triboelectrification of the polymer powder may be linked to changes in electrical surface states, with nitrogen potentially acting as a group V dopant within the PS surface.
Career Highlights
McIntyre has worked at the University of Western Ontario, where he has contributed to research and development in polymer science. His work has been instrumental in advancing the understanding of polymer treatments and their applications.
Collaborations
Some of McIntyre's notable coworkers include Renate Foerch and Duncan H Hunter. Their collaborative efforts have further enriched the research landscape in polymer science.
Conclusion
N Stewart McIntyre's innovative work in the treatment of polymer powders has made a
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile