This inventor holds 2 USPTO granted patents. Top assignee: Macmillan Bloedel Limited. Active years: 1996.
Company Filing History:
Years Active: 1996
Title: Innovations of James A. De Witt
Introduction
James A. De Witt is a notable inventor based in Burnaby, Canada. He has made significant contributions to the field of papermaking through his innovative patents. With a total of 2 patents, his work has had a considerable impact on the industry.
Latest Patents
James A. De Witt's latest patents include advancements in retention aids and neutral papermaking. His first patent focuses on retention aids, where first pass filler retention is achieved by adding a cationic fixative into a filler containing pulp slurry. This method, combined with a conventional polyethylene oxide/promoter retention system, results in a significant increase in the first pass retention of filler. His second patent addresses neutral papermaking, where a pulp furnish predominantly made of wood-containing fibers and natural calcium carbonate is formed into paper at a neutral pH range of 6.7 to 7.5. The use of bentonite and a suitable polymer, such as polyacrylamide, produces a pulp stock with exceptionally high drainage characteristics, particularly when used with chalk as the filler.
Career Highlights
James A. De Witt has worked at Macmillan Bloedel Limited, where he has been able to apply his innovative ideas in practical settings. His contributions have helped improve the efficiency and quality of papermaking processes.
Collaborations
Some of his notable coworkers include Donald T. Eadie and Gordon R. Hayes. Their collaboration has likely contributed to the advancements in the field of papermaking.
Conclusion
James A. De Witt's innovative patents and contributions to the papermaking industry highlight his role as a significant inventor. His work continues to influence the field, showcasing the importance of innovation in enhancing industrial processes.