Inventor

Henry J. Stevens

Inventor

Athens, PA, US

Overview

1994–2011

Patent span

Chemistry

Primary field (CPC C)

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

B22Fprimary

B22FWorking metallic powder28%

C22CAlloys17%

C22BProduction and refining of metals11%

H01KElectric incandescent lamps11%

A01GHorticulture6%

C01GCompounds containing metals not covered by subclasses c01d or c01f6%

C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds6%

C23CCoating metallic material6%

LOC306%

Y10TTechnical subjects covered by former us classification6%

PatentTitleYear

Assembled from patent assignee/location history and declaration credentials.

1994Patents assigned to STEVENS H J (1)· patent assignee history

1994Based in Smackover, AR, US· patent location history

2000–2002Patents assigned to OSRAM SYLVANIA INC (3)· patent assignee history

2000–2011Based in Athens, PA, US· patent location history

2008Patents assigned to STEVENS CYNTHIA H (1)· patent assignee history

2008Patents assigned to STEVENS HENRY (1)· patent assignee history

2008Based in Warner Robins, GA, US· patent location history

2011Patents assigned to GLOBAL TUNGSTEN & POWDERS CORP (2)· patent assignee history

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
OSRAM SYLVANIA INC	3	2000–2002
GLOBAL TUNGSTEN & POWDERS CORP	2	2011
STEVENS CYNTHIA H	1	2008
STEVENS H Jself	1	1994
STEVENS HENRYself	1	2008

Locations