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John C. Opfer
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Chicago, IL, US
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Patents Grants
last 30 patents
Information
Patent Grant
Circuit interrupters with air trap regions in fluid reservoirs
Patent number
9,576,757
Issue date
Feb 21, 2017
S&C Electric Company
John C. Opfer
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Circuit testing closer apparatus and method with in-rush current aw...
Patent number
8,681,462
Issue date
Mar 25, 2014
S&C Electric Company
Raymond P. O'Leary
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
High current capable circuit testing closer apparatus and method
Patent number
7,626,397
Issue date
Dec 1, 2009
S&C Electric Company
John C. Opfer
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Multi-path switching configuration
Patent number
7,440,251
Issue date
Oct 21, 2008
S & C Electric Co.
John C. Opfer
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Manual trip control method and arrangement for multiple circuit int...
Patent number
7,352,265
Issue date
Apr 1, 2008
S & C Electric Co.
John C. Opfer
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Operating arrangement for mechanism
Patent number
6,674,027
Issue date
Jan 6, 2004
S & C Electric Co.
Henry W. Kowalyshen
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Protective device and system
Patent number
6,628,494
Issue date
Sep 30, 2003
S & C Electric Co.
John C. Opfer
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Current transfer arrangement for circuit interrupter
Patent number
6,429,393
Issue date
Aug 6, 2002
S & C Electric Co.
John C. Opfer
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Fault interrupter and operating mechanism therefor
Patent number
6,180,902
Issue date
Jan 30, 2001
S&C Electric Company
Henry W. Kowalyshen
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Disconnect feature for interrupter
Patent number
6,127,637
Issue date
Oct 3, 2000
S & C Electric Co.
John W. Estey
H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information
Patent Grant
Switchgear assembly
Patent number
6,114,642
Issue date
Sep 5, 2000
S & C Electric Co.
Thomas G. French
G01 - MEASURING TESTING
Information
Patent Grant
Switchgear assembly
Patent number
6,040,538
Issue date
Mar 21, 2000
S&C Electric Company
Thomas G. French
G01 - MEASURING TESTING
Information
Patent Grant
Separable, flexible electrical connection arrangement
Patent number
5,904,577
Issue date
May 18, 1999
S&C Electric Company
Roy T. Swanson
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Switchgear assembly
Patent number
5,864,107
Issue date
Jan 26, 1999
S&C Electric Company
Thomas G. French
G01 - MEASURING TESTING
Information
Patent Grant
Flexible connector for high-current conductors
Patent number
5,709,553
Issue date
Jan 20, 1998
S&C Electric Company
John C. Opfer
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Bushing assembly with circuit interrupters including polyphase oper...
Patent number
5,600,112
Issue date
Feb 4, 1997
S&C Electric Company
John C. Opfer
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Contact operating arrangement with shock-reducing feature for high-...
Patent number
5,298,704
Issue date
Mar 29, 1994
S&C Electric Company
John C. Opfer
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Switch-operating mechanism with improved charging arrangement
Patent number
4,683,357
Issue date
Jul 28, 1987
S&C Electric Company
John C. Opfer
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Alignment and centering arrangement for contacts of an interrupting...
Patent number
4,668,848
Issue date
May 26, 1987
S&C Electric Company
Henry W. Kowalyshen
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Pre-insertion resistor mechanism for a circuit interrupting device
Patent number
4,324,959
Issue date
Apr 13, 1982
S&C Electric Company
Walter J. Hall
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Switch operator condition and position indicator mechanism
Patent number
4,238,657
Issue date
Dec 9, 1980
S&C Electric Company
John C. Opfer
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Operating mechanism for a high-voltage switch
Patent number
4,237,357
Issue date
Dec 2, 1980
S&C Electric Company
John C. Opfer
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Operating mechanism for a circuit interrupting device
Patent number
4,203,083
Issue date
May 13, 1980
S&C Electric Company
John C. Opfer
H01 - BASIC ELECTRIC ELEMENTS
Patents Applications
last 30 patents
Information
Patent Application
CIRCUIT INTERRUPTERS WITH AIR TRAP REGIONS IN FLUID RESERVOIRS
Publication number
20150294819
Publication date
Oct 15, 2015
S&C ELECTRIC COMPANY
John C. OPFER
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Circuit Testing Closer Apparatus and Method With In-Rush Current Aw...
Publication number
20080266733
Publication date
Oct 30, 2008
S & C ELECTRIC CO.
Raymond P. O'Leary
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
High current capable circuit testing closer apparatus and method
Publication number
20080024142
Publication date
Jan 31, 2008
S & C ELECTRIC CO.
John C. Opfer
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Electromagnetic actuator
Publication number
20070194872
Publication date
Aug 23, 2007
Andrew D. Pfister
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Manual trip control method and arrangement for multiple circuit int...
Publication number
20060197639
Publication date
Sep 7, 2006
John C. Opfer
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Multi-path switching configuration
Publication number
20060196851
Publication date
Sep 7, 2006
John C. Opfer
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
OPERATING ARRANGEMENT FOR MECHANISM
Publication number
20030213681
Publication date
Nov 20, 2003
Henry W. Kowalyshen
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Operating arrangement for mechanism
Publication number
20030029702
Publication date
Feb 13, 2003
Henry W. Kowalyshen
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Pressure relief arrangement for a housing
Publication number
20020093146
Publication date
Jul 18, 2002
John C. Opfer
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Application
Protective device and system
Publication number
20020021540
Publication date
Feb 21, 2002
John C. Opfer
H01 - BASIC ELECTRIC ELEMENTS