Douglas P. Wittmer

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Shrewsbury, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Flow splitting in supercritical fluid chromatography systems
- Patent number 10,183,238
- Issue date Jan 22, 2019
- Waters Technologies Corporation
- Michael R. Jackson
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Introducing samples into supercritical fluid chromatography systems
- Patent number 9,764,251
- Issue date Sep 19, 2017
- Waters Technologies Corporation
- Emily J. Berg
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Heat exchange surface including a hydrophobic coating layer
- Patent number 9,027,635
- Issue date May 12, 2015
- Waters Technologies Corporation
- Douglas Wittmer
- B64 - AIRCRAFT AVIATION COSMONAUTICS
Information Patent Grant
Electrospray device
- Patent number 6,140,640
- Issue date Oct 31, 2000
- Water Investments Limited
- Douglas P. Wittmer
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Time modulated electrified spray apparatus and process
- Patent number 5,306,910
- Issue date Apr 26, 1994
- Millipore Corporation
- Joseph A. Jarrell
- G01 - MEASURING TESTING
Information Patent Grant
Insulated needle for forming an electrospray
- Patent number 5,223,226
- Issue date Jun 29, 1993
- Millipore Corporation
- Douglas P. Wittmer
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
INTRODUCING SAMPLES INTO SUPERCRITICAL FLUID CHROMATOGRAPHY SYSTEMS
- Publication number 20150047422
- Publication date Feb 19, 2015
- WatersTechnologies Corporation
- Emily J. Berg
- G01 - MEASURING TESTING
Information Patent Application
FLOW SPLITTING IN SUPERCRITICAL FLUID CHROMATOGRAPHY SYSTEMS
- Publication number 20150021265
- Publication date Jan 22, 2015
- WATERS TECHNOLOGIES CORPORATION
- Michael R. Jackson
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Application
MOBILE PHASE SOLVENT DELIVERY MODULE
- Publication number 20130134079
- Publication date May 30, 2013
- WATERS TECHNOLOGIES CORPORATION
- Joseph A. Jarrell
- G01 - MEASURING TESTING
Information Patent Application
DEVICES AND METHODS FOR PREVENTING ICE BUILD-UP AND ARTICLES OF MAN...
- Publication number 20090159751
- Publication date Jun 25, 2009
- Waters Investments Limited
- Douglas P. Wittmer
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...