Stephen S Allen

US Patent:

59048530, May 18, 1999

Filed:

Oct 24, 1997

Appl. No.:

8/957049

Inventors:

Stephen D. Allen - Holladay UT
Leonard Rees Lyman - South Jordan UT

Assignee:

Microbar Incorporated - Sunnyvale CA

International Classification:

C02F1/44;1/56

US Classification:

210638

Abstract:

A process and system for removing heavy metals, fluoride, silica and other contaminants from large volumes of wastewater is disclosed. In the process, a wastewater stream containing the contaminant is treated with a chemical coagulant to create a particle having a diameter greater than 5 microns. Treated wastewater is passed through a microfiltration membrane which physically separates the metal contaminant particle from the wastewater. Commercially available microfiltration membranes having a pore size from 0. 5 micron to 5 microns may be used. The treated wastewater flow rate through the microfiltration membranes can range from 700 gallons per square foot of membrane per day ("GFD") to 1500 GFD. Solids are removed from the membrane surface by periodically backflushing the microfiltration membranes and draining the filtration vessel within which the membranes are located. The dislodged solid material within the filtration vessel is flushed into a holding tank for further processing of the solids.

US Patent:

59102519, Jun 8, 1999

Filed:

Oct 24, 1997

Appl. No.:

8/957053

Inventors:

Stephen D. Allen - Holladay UT
Leonard Rees Lyman - South Jordan UT

Assignee:

Microbar Incorporated - Sunnyvale CA

International Classification:

C02F 144
C02F 156

US Classification:

210638

Abstract:

A process and system for removing heavy metals, fluoride, silica and other contaminants from large volumes of wastewater is disclosed. In the process, a wastewater stream containing the contaminant is treated with a chemical coagulant to create a particle having a diameter greater than 5 microns. Treated wastewater is passed through a microfiltration membrane which physically separates the metal contaminant particle from the wastewater. Commercially available microfiltration membranes having a pore size from 0. 5 micron to 5 microns may be used. The treated wastewater flow rate through the microfiltration membranes can range from 700 gallons per square foot of membrane per day ("GFD") to 1500 GFD. Solids are removed from the membrane surface by periodically backflushing the microfiltration membranes and draining the filtration vessel within which the membranes are located. The dislodged solid material within the filtration vessel is flushed into a holding tank for further processing of the solids.

US Patent:

59650273, Oct 12, 1999

Filed:

Nov 6, 1997

Appl. No.:

8/965574

Inventors:

Stephen D. Allen - Holladay UT
Leonard R. Lyman - South Jordan UT

Assignee:

Microbar Incorporated - Sunnyvale CA

International Classification:

C02F 144
C02F 156

US Classification:

210638

Abstract:

A process and system for removing silica from large volumes of wastewater is disclosed. In the process, a wastewater stream containing silica is treated with a chemical coagulant, such as a epichlorohydrin/dimethylamine polymer, to create spherical particles which agglomerate into clusters having a diameter greater than 5 microns. Treated wastewater is passed through a microfiltration membrane which physically separates the silica contaminant particle from the wastewater. Commercially available microfiltration membranes having a pore size from 0. 5 micron to 5 microns may be used. The treated wastewater flow rate through the microfiltration membranes can range from 150 gallons per square foot of membrane per day ("GFD") to 600 GFD. Solids are removed from the membrane surface by periodically backflushing the microfiltration membranes and draining solids at timed intervals from the filtration vessel within which the membranes are located. The dislodged solid material within the filtration vessel is flushed into a holding tank for further processing of the solids.

US Patent:

59002204, May 4, 1999

Filed:

Jan 16, 1998

Appl. No.:

9/008707

Inventors:

Stephen D. Allen - Holladay UT

Assignee:

Microbar Incorporated - Sunnyvale CA

International Classification:

B01D 6116
C01D 722

US Classification:

423179

Abstract:

A process and system for separating solids from concentration soda ash solution is disclosed. In the process, a soda ash solution feed stream containing solids and other impurities is treated with a chemical coagulant to create solid particles having a diameter greater than 5 microns. Treated feed stream is passed through a microfiltration membrane which physically separates the solids from the soda ash solution. Commercially available microfiltration membranes having a pore size from 0. 5 micron to 5 microns may be used. Solids are removed from the membrane surface by periodically backflushing the microfiltration membranes and draining the filter vessel within which the membranes are located. The dislodged solid material within the filter vessel is flushed removed from the filter vessel for further processing or disposal.

US Patent:

45956561, Jun 17, 1986

Filed:

Jan 6, 1984

Appl. No.:

6/568698

Inventors:

Stephen D. Allen - Park City UT
Michael Thompson - Evansville IN

Assignee:

Becton Dickinson & Company - Paramus NJ

International Classification:

G01N 3353
G01N 33549
G01N 33533
A61K 4900

US Classification:

435 7

Abstract:

Isocyanate or isothiocyanate substituted lactone or thiolactone is employed for coupling one organic compound to another. For example, such coupling agents can be employed for coupling thyroxine or digoxin to a fluorescent compound for use as a tracer in an assay.

US Patent:

46704060, Jun 2, 1987

Filed:

Jan 6, 1984

Appl. No.:

6/568482

Inventors:

Stephen D. Allen - Park City UT
Michael Thompson - Evansville IN

Assignee:

Becton Dickinson and Company - Franklin Lakes NJ

International Classification:

G01N 3353
G01N 33549
G01N 33533
G01N 33534

US Classification:

436500

Abstract:

Bifunctional aromatic compounds are employed as rigid coupling compounds for coupling one organic compound to another. For example, paranitrophenylisocyanate may be employed as a coupling compound for coupling thyroxine to a fluorescent dye to form a tracer for use in an assay.

US Patent:

58716483, Feb 16, 1999

Filed:

Nov 26, 1996

Appl. No.:

8/756681

Inventors:

Stephen D. Allen - Holladay UT
Leonard Rees Lyman - South Jordan UT

Assignee:

Environmental Chemistries, Inc. - Salt Lake City UT

International Classification:

C02F 144
C02F 156

US Classification:

210638

Abstract:

A process and system for removing heavy metals, fluoride, silica and other contaminants from large volumes of wastewater is disclosed. In the process, a wastewater stream containing the contaminant is treated with a chemical coagulant to create a particle having a diameter greater than 5 microns. Treated wastewater is passed through a microfiltration membrane which physically separates the metal contaminant particle from the wastewater. Commercially available microfiltration membranes having a pore size from 0. 5 micron to 5 microns may be used. The treated wastewater flow rate through the microfiltration membranes can range from 700 gallons per square foot of membrane per day ("GFD") to 1500 GFD. Solids are removed from the membrane surface by periodically backflushing the microfiltration membranes and draining the filtration vessel within which the membranes are located. The dislodged solid material within the filtration vessel is flushed into a holding tank for further processing of the solids.

US Patent:

20150248566, Sep 3, 2015

Filed:

Sep 10, 2014

Appl. No.:

14/482460

Inventors:

- Santa Clara CA, US
Scott H. Robinson - Portland OR, US
Howard C. Herbert - Phoenix AZ, US
Geoffrey S. Strongin - Beaverton OR, US
Stephen J. Allen - Santa Clara CA, US
Tobias M. Kohlenberg - Portland OR, US
Uttam K. Sengupta - Portland OR, US

International Classification:

G06F 21/62

Abstract:

Technologies for sensor privacy on a computing device include receiving, by a sensor controller of the computing device, sensor data from a sensor of the computing device; determining a sensor mode for the sensor; and sending privacy data in place of the sensor data in response to a determination that the sensor mode for the sensor is set to a private mode. The technologies may also include receiving, by a security engine of the computing device, a sensor mode change command from a user of the computing device via a trusted input/output path of the computing device; and sending a mode command to the sensor controller to set the sensor mode of the sensor based on the sensor mode change command, wherein the sending the mode command comprises sending the mode command over a private bus established between the security engine and the sensor controller. Other embodiments are described herein.