Jennifer Lynn Waddell

US Patent:

7384533, Jun 10, 2008

Filed:

Jul 10, 2002

Appl. No.:

10/192335

Inventors:

Michael J. Sierakowski - Stillwater MN, US
L. Charles Hardy - St. Paul MN, US
Michael S. Terrazas - Prescott WI, US
Jennifer E. Waddell - Monument CO, US
Bryan J. Johnson - Austin TX, US

Assignee:

3M Innovative Properties Company - St. Paul MN

International Classification:

C25C 1/12

US Classification:

205574, 205576, 205578, 205585

Abstract:

Electrolytic solutions containing organic additive(s) selected from a described class of additives (e. g. , 4,6-dihydroxypyrimidine) reduce overall applied electrical potential of electrolytic cells and/or reduce gas formation at the anode(s) or increase copper production rate. Benefits include reducing overall power consumption and reducing acid mist during electrolytic processes.

US Patent:

55144934, May 7, 1996

Filed:

Mar 6, 1995

Appl. No.:

8/398859

Inventors:

Jennifer E. Waddell - Burnsville MN
William M. Lamanna - Stillwater MN
Larry J. Krause - Stillwater MN
George G. I. Moore - Afton MN
Steven J. Hamrock - St. Paul MN

Assignee:

Minnesota Mining and Manufacturing Company - Saint Paul MN

International Classification:

H01M 604
H01M 616

US Classification:

429199

Abstract:

An electrolyte composition that includes a salt disposed in a matrix in which the salt has a formula selected from the group consisting of ##STR1## in which X. sup. - is --O. sup. -, --N. sup. - SO. sub. 2 R. sub. f. sup. 3, or ##STR2## Z is --CF. sub. 2 --, --O--, --NR. sub. f. sup. 8 --, or --SF. sub. 4 --; R. sub. f. sup. 1 and R. sub. f. sup. 2, independently, are --CF. sub. 3, --C. sub. m F. sub. 2m+1, or --(CF. sub. 2). sub. q --SO. sub. 2 --X. sup. - M. sup. + ; R. sub. f. sup. 3, R. sub. f. sup. 4, and R. sub. f. sup. 5, independently, are --CF. sub. 3, --C. sub. mf. sub. 2m+1, --(CF. sub. 2). sub. q --X. sup. - M. sup. +, ##STR3## R. sub. f. sup. 8 is --CF. sub. 3, --C. sub. m F. sub. 2m+1, or --(CF. sub. 2). sub. q --SO. sub. 2 --X. sup. - M. sup. + ; R. sub. f. sup. 6 and R. sub. f. sup. 7, independently, are perfluoroalkylene moieties having the formula --C. sub. r F. sub.

US Patent:

56037503, Feb 18, 1997

Filed:

Aug 14, 1995

Appl. No.:

8/514808

Inventors:

Michael J. Sierakowski - Grant Township, Washington County MN
Jennifer E. Waddell - Burnsville MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

C22B 1100

US Classification:

75743

Abstract:

This invention provides an improved method of leaching precious and base metal values from ore comprising contacting a metal-bearing ore or ore concentrate with an oxidizing gas solution comprising a solution of an oxidizing gas dissolved in a perfluorinated liquid, said contact being made prior to or during extraction of the precious or base metal from the ore. In another aspect, this invention provides a method of destroying cyanide from a cyanide-containing solution comprising contacting said solution with a solution of an oxidizing gas dissolved in a perfluorinated liquid.

US Patent:

56124317, Mar 18, 1997

Filed:

Jun 7, 1995

Appl. No.:

8/474271

Inventors:

Jennifer E. Waddell - Burnsville MN
Michael J. Sierakowski - Stillwater MN
Patricia M. Savu - Maplewood MN
George G. I. Moore - Afton MN
Chetan P. Jariwala - Woodbury MN
Miguel A. Guerra - Woodbury MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

C08F 1230

US Classification:

526243

Abstract:

A method for improving the recovery of gold and silver from precious metal ore is disclosed. The method comprises contacting precious metal ore with an aqueous solution containing certain fluoroaliphatic surfactants.

US Patent:

58273484, Oct 27, 1998

Filed:

Mar 8, 1996

Appl. No.:

8/612703

Inventors:

Jennifer E. Waddell - Burnsville MN
Michael J. Sierakowski - Stillwater MN
Patricia M. Savu - Maplewood MN
George G. I. Moore - Afton MN
Chetan P. Jariwala - Woodbury MN
Miguel A. Guerra - Woodbury MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

C22B 316

US Classification:

75733

Abstract:

A method for improving the recovery of gold and silver from precious metal ore is disclosed. The method comprises contacting precious metal ore with an aqueous solution containing certain fluoroaliphatic surfactants.

US Patent:

58746161, Feb 23, 1999

Filed:

Dec 22, 1995

Appl. No.:

8/577425

Inventors:

Richard D. Howells - Dellwood MN
William M. Lamanna - Stillwater MN
Alan D. Fanta - Minneapolis MN
Jennifer Waddell - Burnsville MN

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

C07C30338

US Classification:

564 82

Abstract:

A method for preparing fluoroalkylsulfonyl imides by reacting a fluoroalkylsulfonamide with a fluoroalkylsulfonyl halide or a fluorosulfonyl halide in the presence of a non-nucleophilic base. One reaction is: Z--R. sub. f --SO. sub. 2 NH. sub. 2 +Z--R'. sub. f --SO. sub. 2 --X+2B(Z--R. sub. f --SO. sub. 2)(Z--R'. sub. f --SO. sub. 2)N. sup. -. BH. sup. + +BHX, where each Z is a fluorine atom or a polymerizable organic functional group, R. sub. f and R'. sub. f are fluoroalkylene groups optionally containing catenary oxygen or nitrogen, X is a halogen atom, and B is a non-nucleophilic base. Unsymmetrical imides and polymeric imides can be prepared.