Company Filing History:
Years Active: 1981-1983
Title: Innovations of Charles H Pian
Introduction
Charles H Pian is a notable inventor based in Lexington, MA (US). He has made significant contributions to the field of developer compositions, particularly in the realm of electrostatic copying. With a total of 3 patents to his name, his work has had a lasting impact on the industry.
Latest Patents
One of his latest patents is for a thermally stable liquid negative developer. This invention comprises an organic liquid carrier, a pigment, a stabilizing gel, a latex for fixative function, and a two-component charge control agent. The charge control agent includes a first polymer that is soluble in the carrier and has a basic character, and a second polymer that is insoluble or on the borderline of solubility, possessing an acid character. This innovative developer maintains optimum image density even under elevated temperatures during storage or use.
Another significant patent by Pian is a liquid negative developer composition that boasts improved depletion characteristics. This developer consists of an organic carrier containing latex particles, a pigment system, and a charge control agent made from a copolymer of lower alkyl vinyl ether and vinyl chloride. The inclusion of an acrylic polymer gel stabilizes the dispersion, allowing the developer to produce over 20,000 copies with acceptable image density using conventional copying equipment.
Career Highlights
Charles H Pian has had a distinguished career at Nashua Corporation, where he has been instrumental in developing advanced developer compositions. His innovative work has contributed to the efficiency and effectiveness of electrostatic copying technologies.
Collaborations
Throughout his career, Pian has collaborated with notable colleagues, including Norman T Veillette and Tahsin A Ashour. These collaborations have further enhanced the quality and scope of his inventions.
Conclusion
Charles H Pian's contributions to the field of developer compositions have been significant and impactful. His innovative patents continue to influence the industry, showcasing his expertise and dedication to advancing technology.