For the Inventor, By the Inventor

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Houston, TX, United States of America

Spartan Technology Development Corporation

USPTO Granted Patents = 2

Forward Citations = 0

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7 inventors (with patents filed for the assignee):

Jeffrey Ross Johnston (2 out of 11 patents)

Justin Scruggs (2 out of 3 patents)

Fei Tang (1 out of 2 patents)

4. William Kovacs, Iii (1 out of 1 patent)

5. William Amend (1 out of 1 patent)

6. Chris Taylor (1 out of 1 patent)

7. Daniel Hoyer (1 out of 1 patent)

2 patents: Sort by Forward Citations

1. 12116881 - Downhole tool with passive barrier (2024-10-15),

2. 12104456 - Time-delayed, downhole trigger (2024-10-01),

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USPTO Data Jan 1 1976 - Dec 16 2025

2 Patents

#1,504 in Houston, TX

#6,126 in Texas

#92,554 in US

Houston, TX, United States of America

Spartan Technology Development Corporation

Forward Citations = 0

7 inventors:

Jeffrey Ross Johnston (2 out of 11 patents)

Justin Scruggs (2 out of 3 patents)

Fei Tang (1 out of 2 patents)

4. William Kovacs, Iii (1 out of 1 patent)

5. William Amend (1 out of 1 patent)

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