Company Filing History:

6 out of 260

Valence Technology, Inc.

3 out of 832,812

Other

patents

Years Active: 1989-1996

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14 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5545496 - Process for producing filament-like vanadium oxide for use in solid (1996-08-13),

2. 5469069 - Method and apparatus for measuring resistivity of geometrically (1995-11-21),

3. 5442298 - Method and apparatus for measuring resistivity of geometrically (1995-08-15),

4. 5426055 - Method to detect Lewis acid decomposition products in lithium (1995-06-20),

5. 5390230 - Controlled atmosphere, variable volume sample holder for x-ray (1995-02-14),

6. 5326653 - Battery unit with reinforced current collector tabs and method of making (1994-07-05),

7. 5304436 - Method and apparatus for drying a non-aqueous liquid electrolyte (1994-04-19),

8. 5290704 - Method of detecting organic solvent vapors (1994-03-01),

9. 5290702 - Method of detecting and mapping organic solvent-containing materials on (1994-03-01),

10. 4902588 - Electrolyte additives to improve voltage regulation in the (1990-02-20),

11. 4892796 - Positive current collector for lithium secondary system (1990-01-09),

12. 4873158 - Overdischarge protection for rechargeable cells (1989-10-10),

13. 4863815 - Cell design for spirally wound rechargeable alkaline metal cell (1989-09-05),

14. 4844993 - Additive to improve voltage regulation in a lithium-copper chloride (1989-07-04),

Title: On-Kok Chang: Innovator in Material Science

Introduction

On-Kok Chang is a prominent inventor based in San Jose, CA, known for his significant contributions to material science. He holds a total of 14 patents, showcasing his innovative spirit and dedication to advancing technology.

Latest Patents

One of his latest patents is a process for producing filament-like vanadium oxide for use in solid-state applications. This invention provides a novel method for synthesizing vanadium oxide V.sub.6 O.sub.13 with a filament-like morphology by thermally decomposing ammonium metavanadate NH.sub.4 VO.sub.3 in the presence of a compound that sublimes upon heating. The reaction is conducted in an inert gas flow, and the synthesized V.sub.6 O.sub.13 can be utilized as a cathode active material in electrochemical batteries. Another notable patent involves a method and apparatus for measuring the resistivity of geometrically complex materials. This invention aims to improve the accuracy of measuring resistivity and/or conductivity of a paste, featuring an apparatus that measures electrical characteristics by placing a sample in two charge conducting regions of different cross-sectional areas.

Career Highlights

Throughout his career, On-Kok Chang has worked with several notable companies, including Valence Technology, Inc. and Altus Corporation. His work in these organizations has contributed to advancements in battery technology and material measurement techniques.

Collaborations

On-Kok has collaborated with esteemed colleagues such as John C. Hall and Jeffrey Phillips, further enhancing his innovative projects and research endeavors.

Conclusion

On-Kok Chang's contributions to material science and his impressive portfolio of patents highlight his role as a leading inventor in the field. His work continues to influence advancements in technology and energy storage solutions.

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