Gregory C Roberts

US Patent:

6493110, Dec 10, 2002

Filed:

Apr 5, 2000

Appl. No.:

09/543736

Inventors:

Gregory B. Roberts - Mountain View CA 94040

International Classification:

G06F 1300

US Classification:

358 12, 358 15, 400103, 23546201

Abstract:

A method and system for rendering accurate bar code images in a distributed network wherein a plurality of different types of rendering devices, such as printers, having different resolution characteristics are connected for rendering such images. The resolution of a connected rendering device is detected and the bar code image to be rendered by such device is scaled to effect proper alignment of the resolution units of the bar code and the rendering device whereby the need for interpolation is effectively obviated. The bar code is scaled by a whole integer multiplier of the minimum bar code size based upon at least one dimension of the print area of the bar code display and the resolution characteristic of the rendering device. The bar code image is aligned or mapped and is centered in the display area with equal units of the excess print area on either side of the image. By avoiding the need to interpolate print data by the rendering device, the bar code rendering system defeats inaccuracies in detection and decoding and provides a more reliable data recovery system.

US Patent:

6882442, Apr 19, 2005

Filed:

Dec 9, 2002

Appl. No.:

10/314267

Inventors:

Gregory B. Roberts - Mountain View CA, US

International Classification:

G06F015/00

US Classification:

358 12, 358 118, 400102, 235462

Abstract:

A method and system for rendering accurate bar code images in a distributed network wherein a plurality of different types of rendering devices, such as printers, having different resolution characteristics are connected for rendering such images. The resolution of a connected rendering device is detected and the bar code image to be rendered by such device is scaled to effect proper alignment of the resolution units of the bar code and the rendering device whereby the need for interpolation is effectively obviated. The bar code is scaled by a whole integer multiplier of the minimum bar code size based upon at least one dimension of the print area of the bar code display and the resolution characteristic of the rendering device. The bar code image is aligned or mapped and is centered in the display area with equal units of the excess print area on either side of the image. By avoiding the need to interpolate print data by the rendering device, the bar code rendering system defeats inaccuracies in detection and decoding and provides a more reliable data recovery system.

US Patent:

20020004694, Jan 10, 2002

Filed:

Dec 4, 1998

Appl. No.:

09/205012

Inventors:

CAMERON MCLEOD - MOUNTAIN VIEW CA, US
MOSHE GRAY - LOS ALTOS CA, US
GREGORY ROBERTS - SAN JOSE CA, US

International Classification:

G06F013/00
G01M017/00

US Classification:

701/029000, 702/183000

Abstract:

A modular vehicle diagnostic system includes a plurality of devices substantially enclosed by individual housings are selectively interconnected for sensing or receiving selected signals from a vehicle, for selecting vehicle parameters for vehicle diagnosis or evaluation, for processing the signals, and for displaying the vehicle parameters. The devices are interconnected by conjoining mechanisms associated with the individual housings and/or by having communication channels established between them.

US Patent:

20040137327, Jul 15, 2004

Filed:

Jan 13, 2003

Appl. No.:

10/341843

Inventors:

Karl Gross - Fremont CA, US
James Wang - Livermore CA, US
Gregory Roberts - Dublin CA, US

International Classification:

H01M004/58
H01M004/62

US Classification:

429/231800, 429/232000, 429/252000, 252/182100

Abstract:

The present embodiment relates to a method for preparing a composite graphite-silicon negative electrode material whereby an essentially dry mixture of graphite carbon powder and an element or elements selected from the new IUPAC Group Number 12-15 of the Periodic Table of Elements that can form alloys or compounds with lithium is prepared to provide an electrochemically active mixture. A mechanical agitation process serves to mix the constituent materials and to produce a fine dispersion with intimate contact between graphite and the Group 12-15 materials. A lithium ion battery negative electrode of this composition takes synergistic advantage of the high lithium capacity of some IUPAC Group materials and the long cycle-life of graphite negative electrode materials.

US Patent:

20100196768, Aug 5, 2010

Filed:

Apr 25, 2008

Appl. No.:

12/451167

Inventors:

Gregory Roberts - Oakland CA, US
Irfan Rehmanji - Vancouver, CA

International Classification:

H01M 8/22

US Classification:

429406

Abstract:

A zinc/air system such as a fuel cell or mechanically rechargeable zinc/air battery has a zincate-trapping material to extend electrolyte life. Solid calcium hydroxide is used as the zincate-trapping material in some embodiments. The zincate-trapping material may be provided in the form of pellets, powders, or the like in assemblies that permit electrolyte to contact the zincate-trapping material. The assemblies may be replaceable while the system remains in operation. In some embodiments, the assemblies are removable and may be processed after use to collect zinc for recycling.

US Patent:

20110171502, Jul 14, 2011

Filed:

Jan 11, 2011

Appl. No.:

13/004737

Inventors:

Ryan J. Kottenstette - San Francisco CA, US
Eugene Berdichevsky - Menlo Park CA, US
Constantin I. Stefan - San Jose CA, US
Gregory Alan Roberts - Oakland CA, US
Song Han - Foster City CA, US
Yi Cui - Stanford CA, US

Assignee:

AMPRIUS, INC. - Menlo Park CA

International Classification:

H01M 10/42
H01M 10/04
H01M 10/26
H02J 7/04

US Classification:

429 49, 296231, 296232, 320162

Abstract:

Electrochemical cells containing nanostructured negative active materials and composite positive active materials and methods of fabricating such electrochemical cells are provided. Positive active materials may have inactive components and active components. Inactive components may be activated and release additional lithium ions, which may offset some irreversible capacity losses in the electrochemical cells. In certain embodiments, the activation releases lithium ion having a columbic content of at least about 400 mAh/g based on the weight of the activated material.

US Patent:

20120045670, Feb 23, 2012

Filed:

Sep 26, 2011

Appl. No.:

13/245530

Inventors:

Constantin I. Stefan - San Jose CA, US
Rainer J. Fasching - Mill Valley CA, US
Gregory Alan Roberts - Oakland CA, US
Ryan Kottenstette - Los Altos CA, US
Song Han - Foster City CA, US
Ghyrn E. Loveness - East Palo Alto CA, US

Assignee:

AMPRIUS, INC. - Menlo Park CA

International Classification:

H01M 10/48
H01M 10/00
H01M 10/0525

US Classification:

429 61, 42923195, 429 94, 296231

Abstract:

Provided are novel electrochemical cells that include positive electrodes, negative electrodes containing high capacity active materials such as silicon, and auxiliary electrodes containing lithium. An auxiliary electrode is provided in the cell at least prior to its formation cycling and is used to supply lithium to the negative electrode. The auxiliary electrode may be then removed from the cell prior or after formation. The transfer of lithium to the negative electrode may be performed using a different electrolyte, a higher temperature, and/or a slower rate than during later operational cycling of the cell. After this transfer, the negative electrode may remain pre-lithiated during later cycling at least at a certain predetermined level. This pre-lithiation helps to cycle the cell at more optimal conditions and to some degree maintain this cycling performance over the operating life of the cell. Also provided are methods of fabricating such cells.

US Patent:

20120121989, May 17, 2012

Filed:

Nov 15, 2011

Appl. No.:

13/296753

Inventors:

Gregory Alan Roberts - Oakland CA, US
Rainer J. Fasching - Mill Valley CA, US
Constantin I. Stefan - San Jose CA, US

Assignee:

AMPRIUS, INC. - Menlo Park CA

International Classification:

H01M 10/056

US Classification:

429332, 429342

Abstract:

Provided are novel electrolytes for use in rechargeable lithium ion cells containing high capacity active materials, such as silicon, germanium, tin, and/or aluminum. These novel electrolytes include one or more pyrocarbonates and, in certain embodiments, one or more fluorinated carbonates. For example, dimethyl pyrocarbonate (DMPC) may be combine with mono-fluoroethylene carbonate (FEC). Alternatively, DMPC or other pyrocarbonates may be used without any fluorinated carbonates. A weight ratio of pyrocarbonates may be between about 0% and 50%, for example, about 10%. Pyrocarbonates may be combined with other solvents, such as ethylene carbonate (EC), propylene carbonate (PC), dimethyl carbonate (DMC), diethyl carbonate (DEC), and/or ethyl-methyl carbonate (EMC). Alternatively, pyrocarbonates may be used without such solvents. Experimental results conducted using electrochemical cells with silicon based electrodes demonstrated substantial improvements in cycle life when pyrocarbonate containing electrolytes were used in comparison with pyrocarbonate free electrolytes.