Enter assignee name

% 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),

QuantumSphere, Inc. is a leading nanotechnology company focused on the design and production of advanced metallic nanopowders for fuel cells, batteries, solar cells, and other energy storage applications. Through our patented technology, we are revolutionizing the energy industry by creating innovative solutions that are efficient, sustainable, and environmentally friendly.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Sep 15 2026

10 Patents

#42 in Santa Ana, CA

#7,090 in California

#29,779 in US

#55,869 in the World

Santa Ana, CA, United States of America

Quantumsphere, Inc.