Douglas F. Royer

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Gilbert, IA, US

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Patents Grantslast 30 patents

Information Patent Grant
Reducing agent for arsenic measurement
- Patent number 11,719,645
- Issue date Aug 8, 2023
- Hach Company
- Douglas F. Royer
- G01 - MEASURING TESTING
Information Patent Grant
Vial and cap for turbidity standard
- Patent number 10,006,853
- Issue date Jun 26, 2018
- Hach Company
- Douglas Ford Royer
- G01 - MEASURING TESTING
Information Patent Grant
Chromium-free indicating device
- Patent number 8,603,410
- Issue date Dec 10, 2013
- Hach Company
- Douglas F. Royer
- G01 - MEASURING TESTING
Information Patent Grant
Chromium-free indicating device for chloride detection
- Patent number 8,231,841
- Issue date Jul 31, 2012
- Hach Company
- Douglas F. Royer
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
POTASSIUM MALEATE BUFFER FOR FREE CHLORINE ANALYSIS
- Publication number 20240230609
- Publication date Jul 11, 2024
- Hach Company
- Douglas ROYER
- C07 - ORGANIC CHEMISTRY
Information Patent Application
STABILIZED N,N-DIETHYL-P-PHENYLENEDIAMINE SOLUTION AND METHOD FOR D...
- Publication number 20240219309
- Publication date Jul 4, 2024
- Hach Company
- Douglas ROYER
- G01 - MEASURING TESTING
Information Patent Application
REDUCING AGENT FOR ARSENIC MEASUREMENT
- Publication number 20220397534
- Publication date Dec 15, 2022
- Hach Company
- Douglas F. Royer
- G01 - MEASURING TESTING
Information Patent Application
VIAL AND CAP FOR TURBIDITY STANDARD
- Publication number 20180113067
- Publication date Apr 26, 2018
- Hach Company
- Douglas Ford Royer
- G01 - MEASURING TESTING
Information Patent Application
Chromium-Free Indicating Device
- Publication number 20120288954
- Publication date Nov 15, 2012
- Douglas F. Royer
- G01 - MEASURING TESTING
Information Patent Application
Chromium-Free Indicating Device for Chloride Detection
- Publication number 20120064634
- Publication date Mar 15, 2012
- Douglas F. Royer
- G01 - MEASURING TESTING