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Inventor

Dean R. Duffy

Inventor
Woodbury, MN, US

Overview

39→
Patents
1996–2020
Patent span
Human necessities
Primary field (CPC A)

Patents· 39 as inventor

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

A62Bprimary
A62BDevices, apparatus or methods for life-saving22%
A41DOuterwear20%
B01DSeparation19%
Y10TTechnical subjects covered by former us classification15%
LOC2910%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests10%
B31DMaking articles of paper, cardboard or material worked in a manner analogous to paper, not provided for in subclasses b31b or b31c1%
B32BLayered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form1%
B65DContainers for storage or transport of articles or materials, e.g. bags, barrels, bottles, boxes, cans, cartons, crates, drums, jars, tanks, hoppers, forwarding containers1%
F24FAir-conditioning1%
PatentTitleYear
10,602,785Filtering face-piece respirator having nose cushioning member202010,576,314Respirator including contrast layer202010,238,158Filtering face-piece respirator having darted mask body201910,182,603Filtering face-piece respirator having strap-activated folded flange201910,136,687Filtering face-piece respirator having nose notch201810,040,621Filtering face-piece respirator dispenser20189,868,002'Respirator including contrast layer'20189,826,786Horizontal flat-fold filtering face-piece respirator having indicia of symmetry20179,770,057'Filtering face-piece respirator having nose cushioning member'20179,615,612'Filtering face-piece respirator with stiffening member integral with filtering structure'20179,610,528'Filter frame assembly with seal'20179,603,396'Filtering face-piece respirator having nose notch'20179,603,395'Filtering face-piece respirator having darted mask body'20179,012,013'Expandable face mask with reinforcing netting'20158,881,729'Horizontal flat-fold filtering face-piece respirator having indicia of symmetry'2014D0704824'Respirator having folded nose region'20148,640,704'Flat-fold filtering face-piece respirator having structural weld pattern'2014D0692125'Respiratory mask'20138,528,560'Filtering face-piece respirator having parallel line weld pattern in mask body'20138,491,689'Joined filter media pleat packs'20138,419,817'Self-supporting pleated filter media'2013D0678507'Parallel bond lines on a fibrous filtration face mask'20138,360,067'Expandable face mask with engageable stiffening element'2013D0667541'Bond pattern on a personal respiratory protection mask'2012D0659820'Tabs on a personal respiratory protection mask'2012D0659821'Triangular bond pattern on a personal respiratory protection mask'2012D0652910'Filter cartridge'2012D0652506'Filter cartridge having a magenta netting'20128,074,660'Expandable face mask with engageable stiffening element'20117,896,940'Self-supporting pleated filter media'20117,261,757'Slip-rib filter gasketing'20077,258,717'Filter cross brace'20077,235,115'Method of forming self-supporting pleated filter media'20076,926,781'Continuous filter framing strip storable in roll form'20056,797,028'Push-on self attach adaptive filter'20046,740,136'Interconnected filter frame and filter framing method'20046,419,729'Filter assemblies with adhesive attachment systems'20026,406,509'Extruded profile filter framing'20025,531,892'Zigzag filter media and frame having triangular pleat stabilizing elements'1996

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1996–2020Based in Woodbury, MN, US· patent location history
2002–2020Patents assigned to 3M INNOVATIVE PROPERTIES CO (37)· patent assignee history
2011–2017Patents assigned to DUFFY DEAN R (16)· patent assignee history
2012–2014Patents assigned to SPOO SCOTT A (4)· patent assignee history
2013–2017Patents assigned to SNIDER KENNETH J (2)· patent assignee history
2013–2017Patents assigned to YOUNG DONALD E (2)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
3M INNOVATIVE PROPERTIES CO372002–2020
DUFFY DEAN Rself162011–2017
SPOO SCOTT A42012–2014
SNIDER KENNETH J22013–2017
YOUNG DONALD E22013–2017
Locations
LocationPatentsSpan
Woodbury, Minnesota, US391996–2020