Inventor
John E. Langdon
Inventor
Fort Worth, TX, US
Overview
Patents· 5 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
E21Bprimary
E21BEarth or rock drilling36%
B82YSpecific uses or applications of nanostructures27%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests27%
F04BPositive-displacement machines for liquids9%
PatentTitleYear
8,584,752'Process for dispersing nanocatalysts into petroleum-bearing formations'20138,336,623'Process for dispersing nanocatalysts into petroleum-bearing formations'20127,770,646'System, method and apparatus for hydrogen-oxygen burner in downhole steam generator'20107,712,528'Process for dispersing nanocatalysts into petroleum-bearing formations'20104,431,379'Valve piston for constant displacement pump'1984Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1984Patents assigned to CASE CO J I (1)· patent assignee history
1984Based in Racine, WI, US· patent location history
2010–2013Patents assigned to WORLD ENERGY SYSTEMS INC (4)· patent assignee history
2010–2013Based in Fort Worth, TX, US· patent location history
2012Patents assigned to LANGDON JOHN E (1)· patent assignee history
2012Patents assigned to WARE CHARLES H (1)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| WORLD ENERGY SYSTEMS INC | 4 | 2010–2013 |
| CASE CO J I | 1 | 1984 |
| LANGDON JOHN Eself | 1 | 2012 |
| WARE CHARLES H | 1 | 2012 |
Locations
| Location | Patents | Span |
|---|---|---|
| Fort Worth, Texas, US | 4 | 2010–2013 |
| Racine, WI, US | 1 | 1984 |