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• 15 United States
• 10 France
• 8 Japan
• 7 China
• 5 Korea
• 2 Other

Patent Owner(s)

Patent Owner	Address	Total Patents
Deutsche Forschungs- und Versuchsanstalt fur Luft- und Raumfahrt e.V.	COLOGNE	38
DEUTSCHE FORSCHUNGSANSTALT FUR LUFT- UND RAUMFAHRT, LINDER HOHE, D-5000 KOLN 90, FED. REP. OF GERMANY	COLOGNE	0

International Classification(s)

• G01N:INVESTIGATING OR ANALYSING MATERIALS BY DETERMININ....

• [Classification Symbol]

• [Patents Count]

Inventor(s)

Inventor Name	Address	# of filed Patents	Total Citations
Rosteck, Helmut T A	Wolfenbuttel, DE	1	9
Schmitt, Dirk-Roger	Braunschweig, DE	3	20

Cited Art Landscape

Patent Info	(Count)	# Cites	Year
Swiss Aluminium Ltd. (1)
* 4703187 Method and apparatus for the determination of the thickness of transparent layers of lacquer		24	1986

* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info	(Count)	# Cites	Year
Other [Check patent profile for assignment information] (1)
6247238 Laser marking device		10	1999
UNITED MODULE CORPORATION (1)
* 5726455 Disk film optical measurement system		48	1996
TECHINT COMPAGNIA TECNICA INTERNAZIONALE S.P.A. (1)
6222628 Surface characteristics measurement system and method		21	1999
HDI INSTRUMENTATION (1)
* 5898181 Thin film optical measurement system		11	1997
ALLIANCE FOR SUSTAINABLE ENERGY, LLC (2)
* 6275295 Optical system for determining physical characteristics of a solar cell		8	1999
9234843 On-line, continuous monitoring in solar cell and fuel cell manufacturing using spectral reflectance imaging		0	2011
SCHMITT MEASUREMENT SYSTEMS, INC. (2)
* 5625451 Methods and apparatus for characterizing a surface		29	1995
* 5661556 System for measuring the total integrated scatter of a surface		12	1996
OPTOMACHINES (3)
7041997 Device and method for optical control under diffuse illumination and observation means of crockery items or any glazed ceramic products		2	2001
* 2003/0184,740 Device and method for optical control of crockery items such as enamelled plates or and enamelled ceramic product		3	2002
* 2006/0180,775 Device and method for optical control under diffuse illumination and observation means of crockery items or any glazed ceramic products		7	2006
UNIVERSITY OF LEICESTER (1)
* 2010/0032,568 DETECTION OF THE ENERGY OF PHOTONS FROM BIOLOGICAL ASSAYS		2	2009

* Cited By Examiner

Maintenance Fees

Fee	Large entity fee	small entity fee	micro entity fee	due date

Fee	Large entity fee	small entity fee	micro entity fee
Surcharge after expiration - Late payment is unavoidable	$700.00	$350.00	$175.00
Surcharge after expiration - Late payment is unintentional	$1,640.00	$820.00	$410.00

Full Text

US Patent No: 4972092

Apparatus for determining the effective surface roughness of polished optical samples by measuring the integral scattered radiation

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