Inventor
Douglas G. Crofoot
Inventor
Burnsville, MN, US
Overview
Patents· 23 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B01Dprimary
B01DSeparation15%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests14%
Y10TTechnical subjects covered by former us classification14%
D01FChemical features in the manufacture of artificial filaments, threads, fibres, bristles or ribbons13%
D01DMechanical methods or apparatus in the manufacture of artificial filaments, threads, fibres, bristles or ribbons12%
B82YSpecific uses or applications of nanostructures11%
C08LCompositions of macromolecular compounds11%
D04HMaking textile fabrics, e.g. from fibres or filamentary material11%
PatentTitleYear
10,967,315Fine fiber media layer202110,272,374Fine fiber media layer20199,718,012'Fine fiber media layer'20178,709,118'Fine fiber media layer'20148,512,431'Fine fiber media layer'20138,366,797'Fine fiber media layer'20138,177,876'Reduced solidity web comprising fiber and fiber spacer or separation means'20128,118,901'Fine fiber media layer'20128,029,588'Fine fiber media layer'20117,918,913'Reduced solidity web comprising fiber and fiber spacer or separation means'20117,717,975'Reduced solidity web comprising fiber and fiber spacer or separation means'20107,318,853'Polymer, polymer microfiber, polymer nanofiber and applications including filter structures'20087,318,852'Bag house filter with fine fiber and spun bonded media'20087,316,723'Air filter with fine fiber and spun bonded media'20087,270,693'Polymer, polymer microfiber, polymer nanofiber and applications including filter structures'20077,179,317'Polymer, polymer microfiber, polymer nanofiber and applications including filter structures'20077,090,715'Polymer, polymer microfiber, polymer nanofiber and applications including filter structures'20067,070,640'Polymer, polymer microfiber, polymer nanofiber and applications including filter structures'20066,955,775'Process if making fine fiber material'20056,924,028'Polymer, polymer microfiber, polymer nanofiber and applications including filter structures'20056,746,517'Filter structure with two or more layers of fine fiber having extended useful service life'20046,743,273'Polymer, polymer microfiber, polymer nanofiber and applications including filter structures'20045,066,400'Self-spaced pleated filter'1991Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1991–2021Patents assigned to DONALDSON CO INC (23)· patent assignee history
1991–2021Based in Burnsville, MN, US· patent location history
2012–2013Patents assigned to CROFOOT DOUGLAS G (4)· patent assignee history
2012–2013Patents assigned to CHUNG HOO Y (3)· patent assignee history
2012–2013Patents assigned to GOGINS MARK A (3)· patent assignee history
2012–2013Patents assigned to HALL JOHN R B (3)· patent assignee history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| DONALDSON CO INC | 23 | 1991–2021 |
| CROFOOT DOUGLAS Gself | 4 | 2012–2013 |
| CHUNG HOO Y | 3 | 2012–2013 |
| GOGINS MARK A | 3 | 2012–2013 |
| HALL JOHN R B | 3 | 2012–2013 |
Locations
| Location | Patents | Span |
|---|---|---|
| Burnsville, Minnesota, US | 23 | 1991–2021 |