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Inventor

David W. Keck

Inventor
Butte, MT, US

Overview

9→
Patents
1994–2004
Patent span
Chemistry
Primary field (CPC C)

Patents· 9 as inventor

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

C23Cprimary
C23CCoating metallic material35%
Y10TTechnical subjects covered by former us classification25%
C01BNon-metallic elements15%
H01HElectric switches10%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests10%
G05GControl devices or systems insofar as characterised by mechanical features only5%
PatentTitleYear
6,749,824'Chemical vapor deposition system for polycrystalline silicon rod production'20046,676,916'Method for inducing controlled cleavage of polycrystalline silicon rod'20046,544,333'Chemical vapor deposition system for polycrystalline silicon rod production'20036,221,155'Chemical vapor deposition system for polycrystalline silicon rod production'2001RE036936'Production of high-purity polycrystalline silicon rod for semiconductor applications'20005,545,387'Production of high-purity polycrystalline silicon rod for semiconductor applications'19965,478,396'Production of high-purity polycrystalline silicon rod for semiconductor applications'19955,357,067'Cam arrangement for use in rotary position indicators'19945,352,858'Hermetically sealed snap switch assembly with pre-use backfilling option'1994

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1994Patents assigned to DWYER INSTR (2)· patent assignee history
1994Based in Michigan City, IN, US· patent location history
1995–2000Patents assigned to ADVANCED SILICON MATERIALS INC (2)· patent assignee history
1995–1996Based in Moses Lake, WA, US· patent location history
1996Patents assigned to ADVANCED SILCON MATERIALS INC (1)· patent assignee history
2000–2004Based in Butte, MT, US· patent location history
2001–2004Patents assigned to ADVANCED SILICON MATERIALS LLC (4)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
ADVANCED SILICON MATERIALS LLC42001–2004
ADVANCED SILICON MATERIALS INC21995–2000
DWYER INSTR21994
ADVANCED SILCON MATERIALS INC11996
Locations
LocationPatentsSpan
Butte, MT, US52000–2004
Moses Lake, Washington, US21995–1996
Michigan City, IN, US21994