Inventor

Stephen Keen

Inventor

Erie, CO, US

Overview

10→

Patents

2011–2021

Patent span

LOC

Primary field

Patents· 10 as inventor

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

LOC26primary

LOC2623%

F21VFunctional features or details of lighting devices or systems thereof14%

A01GHorticulture9%

C07DHeterocyclic compounds9%

A61KPreparations for medical, dental or toiletry purposes5%

A61PSpecific therapeutic activity of chemical compounds or medicinal preparations5%

C07BGeneral methods of organic chemistry5%

C12PFermentation or enzyme-using processes to synthesise a desired chemical compound or composition or to separate optical isomers from a racemic mixture5%

E05CBolts or fastening devices for wings, specially for doors or windows5%

F21WIndexing scheme associated with subclasses f21k, f21l, f21s and f21v, relating to uses or applications of lighting devices or systems5%

PatentTitleYear

11,124,478Process for making beta 3 agonists and intermediates2021 10,899,771Process for making beta 3 agonists and intermediates2021 10,113,343Thermally isolated high intensity light source2018 D0794842'Thermally isolated high intensity light source with spacers'2017 D0748847'Liquid-cooled optical reflector'2016 D0748850'Air-cooled optical reflector'2016 D0748319'Vented optical reflector'2016 D0748320'Liquid-cooled optical reflector'2016 7,982,376'Apparatus and method for removing heat from high intensity light bulbs'2011 7,954,982'High intensity light reflector apparatus'2011

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

2011Patents assigned to KEEN STEPHEN B (2)· patent assignee history

2011Patents assigned to MAREK THOMAS E (1)· patent assignee history

2011Based in Elgin, TX, US· patent location history

2016–2018Patents assigned to SURNA INC (6)· patent assignee history

2016–2018Based in Erie, CO, US· patent location history

2021Patents assigned to MERCK SHARP & DOHME (2)· patent assignee history

2021Based in Hoddesdon, GB· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
SURNA INC	6	2016–2018
KEEN STEPHEN Bself	2	2011
MERCK SHARP & DOHME	2	2021
MAREK THOMAS E	1	2011

Locations

Location	Patents	Span
Erie, CO, US	6	2016–2018
Hoddesdon, GB	2	2021
Elgin, Texas, US	2	2011