Frederick V Johnson

20130075254, Mar 28, 2013

Sep 24, 2012

13/625602

Frederick Quincy Johnson - Pleasanton CA, US

G01N 27/414

204406, 204416

A meter is adapted for measuring concentrations of a chemical in a flowing solution. The meter has a barrier that shields a sensor from the high turbulence of the solution flow. One or more membranes can be employed to selectively filter out various ions or other chemicals.

20130084214, Apr 4, 2013

Sep 27, 2012

13/629116

Frederick Quincy Johnson - Pleasanton CA, US
Mark Bain - Mountain View CA, US
Henry Roskos - Los Gatos CA, US

G01N 27/00
G01N 37/00

422 8203, 73 6143

An ion concentration meter measures a concentration of an ion in a solution by exposing both an ISFET gate and a reference electrode within a filtered test area. In preferred embodiments, the test area filters preferred compounds from a solution being tested by occluding an opening to the test area with a species-selective membrane. Contemplated species-selective membranes include silicate membranes, chalcogenide membranes, lanthanum fluoride membranes, and valinomycin membranes.

20130085701, Apr 4, 2013

Sep 27, 2012

13/629056

Mark Bain - Mountain View CA, US
Frederick Quincy Johnson - Pleasanton CA, US

G01C 19/00
G01N 27/414

702104

An ion meter is calibrated by providing two ISFETS with different areas, where the two gate areas are used to calibrate the two ISFETS with respect to one another. The use of two ISFET gates that can be calibrated with respect to one another eliminates the need for an ion meter to be recalibrated before every use, and allows the ion meter to measure the concentration in the solution over an extended period of time.

47903520, Dec 13, 1988

Aug 7, 1987

7/082457

Paul Dietiker - Redondo Beach CA
Frederick W. Johnson - Torrance CA

Honeywell Inc. - Minneapolis MN

F16K 3142

137613

A slow opening and fast closing gas valve includes a valve seat and a valve closure member arranged to respond to a gas pressure to seal aganst the valve seat to close the valve to an input gas flow therethrough. In order to open the valve, the gas exerting the gas pressure for sealing the valve closure member against the valve seat is allowed to bleed-off through a fixed restriction while the input gas is allowed to urge the valve closure member away from the valve seat to provide a slow opening of the input gas flow path through the valve. In order to close the input gas path through the valve, the input gas pressure is applied to the valve closure member to assist a closure spring in urging the valve closure member against the valve seat to produce a fast closure of the valve. A second valve is arranged to selectively control the flow path of the gas being bled off from the valve closure member to provide an unrestricted flow path or a restricted flow path through the fixed restriction. The restricted flow path is used during the opening of the gas valve while the unrestricted flow path is used during a closing of the gas valve.

20200050694, Feb 13, 2020

Aug 13, 2018

16/102545

- Seattle WA, US
Andrew Edward Caldwell - Santa Clara CA, US
Naresh Chainani - Mountain View CA, US
Martin Grund - Lafayette CA, US
Anurag Windlass Gupta - Atherton CA, US
Frederick Ryan Johnson - Orem UT, US
Ippokratis Pandis - Menlo Park CA, US
Michail Petropoulos - San Francisco CA, US
Srividhya Srinivasan - Palo Alto CA, US

Amazon Technologies, Inc. - Seattle WA

G06F 17/30

Burst performance of a database query may be determined according to a size of the database query. A query to a database may be received. A size may be determined for the query. If the size is less than a size threshold assigned to a first query engine, then the query may be performed at the first query engine. If the size is greater than or equal to the size threshold assigned to the first query engine, then the query may be performed at a second query engine.

20190323988, Oct 24, 2019

Jun 28, 2019

16/456851

- Los Gatos CA, US
Frederick Quincy Johnson - Pleasanton CA, US

G01N 27/414

A meter is adapted for measuring concentrations of a chemical in a flowing solution. The meter has a barrier that shields a sensor from the high turbulence of the solution flow. One or more membranes can be employed to selectively filter out various ions or other chemicals.

20180340908, Nov 29, 2018

Aug 2, 2018

16/053528

- Los Gatos CA, US
Frederick Quincy Johnson - Pleasanton CA, US

G01N 27/414

A meter is adapted for measuring concentrations of a chemical in a flowing solution. The meter has a barrier that shields a sensor from the high turbulence of the solution flow. One or more membranes can be employed to selectively filter out various ions or other chemicals.