Company Filing History:
8 out of 8,033 
6 out of 992 
1 out of 309 
Years Active: 1978-1993
Title: The Innovations of Andrew S Sweetana, Jr.
Introduction
Andrew S Sweetana, Jr. is a notable inventor based in Bloomington, IN (US). He has made significant contributions to the field of electrical engineering, particularly in the development of varistors. With a total of 15 patents to his name, Sweetana has demonstrated a commitment to innovation and improvement in electronic components.
Latest Patents
Among his latest patents is the "Surge stability improvement of zinc oxide varistor discs." This patent describes a method of manufacturing varistors by combining preselected amounts of ZnO with specific additives such as B, Na, Bi₂O₃, and BaO. The process involves pressing the mixture into a disc, sintering it at a selected temperature, and then annealing it at a second temperature. This method results in varistors with enhanced high-temperature performance when followed by a low-temperature tempering cycle. Another significant patent is the "High energy absorbing varistor," which outlines a method for producing varistors with high energy absorption. This is achieved by combining predetermined quantities of Bi₂O₃, BaO, SiO₂, and Sb₂O₃ with ZnO to create a mixture that is sintered to form a varistor disc capable of high energy absorption.
Career Highlights
Sweetana has worked with prominent companies in the electrical industry, including Westinghouse Electric Corporation and the Electric Power Research Institute. His experience in these organizations has contributed to his expertise and the development of his innovative patents.
Collaborations
Throughout his career, Sweetana has collaborated with notable colleagues such as Tapan K Gupta and William G Carlson. These collaborations have likely fostered an environment of shared knowledge and innovation.
Conclusion
Andrew S Sweetana, Jr. is a distinguished inventor whose work in the field of varistors has led to significant advancements in electronic components. His patents reflect a deep understanding of materials and manufacturing processes, contributing to improved performance in electrical applications.
Inventor’s Patent Attorneys refers to legal professionals with specialized expertise in representing inventors throughout the patent process. These attorneys assist inventors in navigating the complexities of patent law, including filing patent applications, conducting patent searches, and protecting intellectual property rights. They play a crucial role in helping inventors secure patents for their innovative creations.