% Expired Patents = 80.0

Trademarks = 2

Forward Citations = 69

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9 inventors (with patents filed for the assignee):

R Douglas Carpenter (3 out of 3 patents)

Ray Douglas Carpenter (3 out of 3 patents)

Kimberly McGrath (2 out of 2 patents)

4. Kevin D Maloney (2 out of 6 patents)

5. Robert B Dopp (2 out of 43 patents)

6. Allan Nettleton (1 out of 1 patent)

7. Vito A Canuso, Iii (1 out of 1 patent)

8. Douglas Carpenter (1 out of 1 patent)

9. Subramanian Srikanteswara Iyer (1 out of 129 patents)

10 patents: Sort by Forward Citations

1. 9272920 - System and method for ammonia synthesis (2016-03-01),

2. 8500427 - Method and apparatus for forming nano-particles (2013-08-06),

3. 8211594 - Compositions of nanometal particles containing a metal or alloy and platinum particles (2012-07-03),

4. 7955755 - Compositions of nanometal particles containing a metal or alloy and platinum particles (2011-06-07),

5. 7897294 - Nano-material catalyst device (2011-03-01),

6. 7803295 - Method and apparatus for forming nano-particles (2010-09-28),

7. 7713043 - Apparatus for uniform feeding of powders (2010-05-11),

8. 7709127 - Electro-catalytic recharging composition (2010-05-04),

9. 7700214 - Metal hydride fuel cell cartridge and electrolyzer electrode (2010-04-20),

10. 7282167 - Method and apparatus for forming nano-particles (2007-10-16),

Company Overview

Quantumsphere, Inc. is a technology company based in Santa Ana, California, specializing in advanced materials and energy solutions. The organization focuses on the development and manufacturing of innovative nanomaterials and energy storage systems, particularly in the fields of battery technology and fuel cells. By leveraging cutting-edge research, Quantumsphere aims to enhance the performance and efficiency of energy systems, contributing to advancements in renewable energy and sustainable technologies.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

10 Patents

#42 in Santa Ana, CA

#7,108 in California

#29,839 in US

#55,986 in the World

Santa Ana, CA, United States of America

Quantumsphere, Inc.

Forward Citations = 69

9 inventors:

R Douglas Carpenter (3 out of 3 patents)

Ray Douglas Carpenter (3 out of 3 patents)

Kimberly McGrath (2 out of 2 patents)

4. Kevin D Maloney (2 out of 6 patents)

5. Robert B Dopp (2 out of 43 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Quantumsphere, Inc.. Retrieved from https://idiyas.com/company/quantumsphere

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]