Location History:
- Oakville, CA (1976 - 1977)
- Northfield, OH (US) (1980)
Company Filing History:
2 out of 536 
1 out of 1 Years Active: 1976-1980
Title: The Innovations of John A. Topping
Introduction
John A. Topping is a notable inventor based in Oakville, CA. He has made significant contributions to the field of materials science, particularly in the development of corrosion-resistant glassceramic-to-metal seals. With a total of 3 patents to his name, Topping's work has had a lasting impact on various industries.
Latest Patents
One of Topping's latest patents is a method for forming corrosion-resistant glassceramic-to-metal seals. This innovative process involves a single rapid heating step, where a glass preform composed of 25-35% by weight ZnO, 2.5-10% by weight Al₂O₃, and 30-60% SiO₂ is inserted between a metal pin and a surrounding metal collar. The heating is designed to fluidize the glass while minimizing oxidation of the metal components and preventing excessive interaction at the glass/collar interface. The resulting seals demonstrate excellent corrosion resistance to potassium hydroxide solutions, making them particularly useful in Ni-Cd batteries. Another significant patent involves hermetic glass seals with high electrical resistivity, which are based on lead-silica glasses and are suitable for use in nuclear reactor environments.
Career Highlights
Throughout his career, John A. Topping has worked with various organizations, including Her Majesty the Queen in Right of Canada and Quality Hermetics Limited. His expertise in materials science has allowed him to develop innovative solutions that address critical challenges in the industry.
Collaborations
Topping has collaborated with notable professionals in his field, including Peter Mayer and M. Krishna Murthy. These partnerships have contributed to the advancement of his research and the successful development of his patented technologies.
Conclusion
John A. Topping's contributions to the field of materials science, particularly through his innovative patents, have established him as a significant figure in the industry. His work continues to influence advancements in corrosion-resistant materials and hermetic sealing technologies.