This inventor holds 2 USPTO granted patents. Top assignees: I.s.c. Smelting Limited, Metallurgical Processes Ltd.. Active years: 1980-1981.
Company Filing History:
2 out of 9 
2 out of 10 Years Active: 1980-1981
Title: Innovations of James A Charles
Introduction
James A Charles is a notable inventor based in Stapleford, GB. He has made significant contributions to the field of materials science, particularly in the development of sulphide pellet materials and roasting processes. With a total of 2 patents, his work has implications for various industrial applications.
Latest Patents
One of his latest patents is focused on sulphide pellet materials. This invention describes a substantially spherical pellet composed predominantly of lead sulphide, which is coated with predominantly zinc sulphide material. The lead sulphide core measures between 2-6 mm in diameter, while the zinc sulphide coating has a thickness ranging from 1-3 mm. The weight ratio of zinc sulphide to lead sulphide is maintained between 1.5:1 to 2.5:1. Another significant patent involves a process for roasting zinc/lead sulphide materials. This process includes forming substantially spherical pellets composed predominantly of lead sulphide, coating them with predominantly zinc sulphide material, and roasting the coated pellets in a roasting apparatus to effect oxidation of sulphide, predominantly to oxide.
Career Highlights
Throughout his career, James A Charles has worked with various companies, including Metallurgical Processes Ltd. and I.S.C. Smelting Limited. His experience in these organizations has allowed him to refine his expertise in materials processing and innovation.
Conclusion
James A Charles is a distinguished inventor whose work in sulphide materials and roasting processes has made a significant impact in the field. His contributions continue to influence industrial practices and highlight the importance of innovation in materials science.