This inventor holds 5 USPTO granted patents. Top assignee: General Electric Company. Active years: 1976-1980.
Company Filing History:
Years Active: 1976-1980
Title: The Innovative Contributions of Warella R. Browall
Introduction
Warella R. Browall is a notable inventor based in Scotia, NY (US). He has made significant contributions to the field of polymer technology, particularly in the development of advanced membrane materials. With a total of 5 patents to his name, Browall's work has implications for various industrial applications.
Latest Patents
Browall's latest patents include a method for casting ultrathin methylpentene polymer membranes. This innovative method describes an improved technique for solvent casting ultrathin non-porous methylpentene polymer films. The casting solution comprises methylpentene polymer or a mixture with organopolysiloxane-polycarbonate copolymer dissolved in a solvent system. This solution is characterized by its ability to spontaneously spread over the surface of the liquid casting substrate. In a preferred embodiment, large-area films less than 200 Angstroms in thickness can be repeatedly formed. The solidified films remain relatively free of tensile stress during formation. The casting solution is deposited in a narrow, longitudinally-extending defined region at the surface of the casting substrate. The surface area and perimeter of this defined region are enlarged over the surface of the casting substrate, allowing the casting solution to move relative to the substrate. After desolvation, the polymer film formed remains stationary relative to the casting substrate and is relatively free of tensile stress. These films are useful as semipermeable membranes for selectively removing oxygen gas from mixtures with nitrogen gas.
Another significant patent is for an ultrathin permselective polyetherimide membrane. This membrane has an average thickness of less than about 10 microns and is formed from a polymeric composition comprising a polyetherimide prepared by reacting metaphenylenediamine with certain aromatic bis(ether anhydride)s. A gas separation process employing this membrane is also disclosed.
Career Highlights
Browall is currently associated with General Electric Company, where he continues to innovate and develop new technologies. His work has been instrumental in advancing the field of gas separation and membrane technology.
Collaborations
Throughout his career, Browall has collaborated with notable colleagues, including Raymond G. Lavigne and Shiro G. Kimura. These collaborations have further enhanced the impact of his inventions and research.
Conclusion
Warella R.