Franciscus Roffelsen

Person

Helmond, NL

People

Patents Grantslast 30 patents

Information Patent Grant
Non-return valve
- Patent number 6,968,863
- Issue date Nov 29, 2005
- Franciscus Roffelsen
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Method for manufacturing a double-walled heat exchanging tube with...
- Patent number 6,926,069
- Issue date Aug 9, 2005
- Spiro Research B.V.
- Franciscus Roffelsen
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method for operating a closed hot-water installation and apparatus...
- Patent number 6,526,921
- Issue date Mar 4, 2003
- Spiro Research B.V.
- Franciscus Roffelsen
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Heat exchanger tube and method of manufacturing same
- Patent number 6,192,583
- Issue date Feb 27, 2001
- Spiro Research B.V.
- Franciscus Roffelsen
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Expansion control for a closed fluid circulation system
- Patent number 6,119,951
- Issue date Sep 19, 2000
- Spiro Research B.V.
- Franciscus Roffelsen
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Method and apparatus for deaerating a liquid in a substantially clo...
- Patent number 5,601,635
- Issue date Feb 11, 1997
- Spiro Research B.V.
- Franciscus Roffelsen
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Method and device for maintaining a fluid at a working pressure in...
- Patent number 5,456,409
- Issue date Oct 10, 1995
- Spiro Research B.V.
- Franciscus Roffelsen
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Fixing device for mounting objects on supports
- Patent number 4,747,737
- Issue date May 31, 1988
- Spiro Research B.V.
- Franciscus Roffelsen
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Method of and apparatus for the deaeration of liquid flowing in a c...
- Patent number 4,718,922
- Issue date Jan 12, 1988
- Spiro Research B.V.
- Franciscus Roffelsen
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Heat exchanger duct with heat exchange wiring
- Patent number 4,655,282
- Issue date Apr 7, 1987
- Spiro Research B.V.
- Franciscus Roffelsen
- F28 - HEAT EXCHANGE IN GENERAL
Information Patent Grant
Pipe for utility or service systems
- Patent number 4,646,823
- Issue date Mar 3, 1987
- Spiro Research B.V.
- Franciscus Roffelsen
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Method and apparatus for reducing the gas content of a liquid
- Patent number 4,645,518
- Issue date Feb 24, 1987
- Spiro Research B.V.
- Franciscus Roffelsen
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Method of and apparatus for the degasification of circulation syste...
- Patent number 4,456,172
- Issue date Jun 26, 1984
- Spiro Research B.V.
- Franciscus Roffelsen
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Apparatus for venting and/or degassing a pipeline system
- Patent number 4,381,928
- Issue date May 3, 1983
- Spiro Research B.V.
- Franciscus Roffelsen
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Heat exchanger
- Patent number 3,968,554
- Issue date Jul 13, 1976
- Naamloze Venootschap Spiro Research N.V.
- Franciscus Roffelsen
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Patents Applicationslast 30 patents

Information Patent Application
Method for feeding a closed liquid system
- Publication number 20040244847
- Publication date Dec 9, 2004
- Franciscus Roffelsen
- F24 - HEATING RANGES VENTILATING

Franciscus Roffelsen

Person

Patents Grantslast 30 patents

Non-return valve

Method for manufacturing a double-walled heat exchanging tube with...

Method for operating a closed hot-water installation and apparatus...

Heat exchanger tube and method of manufacturing same

Expansion control for a closed fluid circulation system

Method and apparatus for deaerating a liquid in a substantially clo...

Method and device for maintaining a fluid at a working pressure in...

Fixing device for mounting objects on supports

Method of and apparatus for the deaeration of liquid flowing in a c...

Heat exchanger duct with heat exchange wiring

Pipe for utility or service systems

Method and apparatus for reducing the gas content of a liquid

Method of and apparatus for the degasification of circulation syste...

Apparatus for venting and/or degassing a pipeline system

Heat exchanger

Patents Applicationslast 30 patents

Method for feeding a closed liquid system