Inventor
John G Pursell
Inventor
Mountain Brook, AL, US
Overview
Patents· 3 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B22Fprimary
B22FWorking metallic powder15%
C22CAlloys15%
B23PMetal-working not otherwise provided for8%
C05BPhosphatic fertilisers8%
C05CNitrogenous fertilisers8%
C05DInorganic fertilisers not covered by subclasses c05b, c05c8%
C05FOrganic fertilisers not covered by subclasses c05b, c05c, e.g. fertilisers from waste or refuse8%
C05GMixtures of fertilisers covered individually by different subclasses of class c058%
C12NMicroorganisms or enzymes8%
F01DNon-positive displacement machines or engines, e.g. steam turbines8%
Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2004–2010Patents assigned to ROLLS ROYCE PLC (2)· patent assignee history
2004Based in Derby, GB· patent location history
2010Based in Bristol, GB· patent location history
2021Patents assigned to AMVAC CHEMICAL CORP (1)· patent assignee history
2021Patents assigned to PURSELL AGRI TECH LLC (1)· patent assignee history
2021Based in Mountain Brook, AL, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| ROLLS ROYCE PLC | 2 | 2004–2010 |
| AMVAC CHEMICAL CORP | 1 | 2021 |
| PURSELL AGRI TECH LLC | 1 | 2021 |
Locations
| Location | Patents | Span |
|---|---|---|
| Mountain Brook, AL, US | 1 | 2021 |
| Bristol, GB | 1 | 2010 |
| Derby, GB | 1 | 2004 |