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Inventor

Gordon L. Johnston

Inventor
Maple Grove, MN, US

Overview

5→
Patents
1979–2020
Patent span
Human necessities
Primary field (CPC A)

Patents· 5 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

B01Dprimary
B01DSeparation21%
A61JContainers specially adapted for medical or pharmaceutical purposes14%
A61MDevices for introducing media into, or onto, the body14%
A61PSpecific therapeutic activity of chemical compounds or medicinal preparations14%
G09BEducational or demonstration appliances14%
B04CApparatus using free vortex flow, e.g. cyclones7%
E21BEarth or rock drilling7%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests7%
PatentTitleYear
10,786,629Drug cassette, autoinjector, and autoinjector system202010,492,990Drug cassette, autoinjector, and autoinjector system20194,507,203'Filter element'19854,204,849'Discharge valve assembly for multiple-stage dust collector'19804,144,043'Three-stage dust collector'1979

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1979–1985Patents assigned to DONALDSON CO INC (3)· patent assignee history
1979–1985Based in Maple Grove, MN, US· patent location history
2019–2020Patents assigned to AMGEN INC (2)· patent assignee history
2019–2020Based in Dallas, TX, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
DONALDSON CO INC31979–1985
AMGEN INC22019–2020
Locations
LocationPatentsSpan
Maple Grove, Minnesota, US31979–1985
Dallas, Texas, US22019–2020