ALEXANDER LEEF
Broker in Waltham, MA
License number
Massachusetts 50902
Issued Date
Apr 10, 1984
Expiration Date
Jul 29, 1996
Type
Salesperson
Address
Address
Waltham, MA 02454
Professional information
Additives For Alkaline Electrochemical Cells Having Manganese Dioxide Cathodes
US Patent:
5532085, Jul 2, 1996
Filed:
Aug 22, 1995
Appl. No.:
8/518120
Inventors:
Stuart M. Davis - Norfolk MA
Christopher P. Haines - Westford MA
Alexander A. Leef - Waltham MA
Peter R. Moses - Windham NH
Christopher P. Haines - Westford MA
Alexander A. Leef - Waltham MA
Peter R. Moses - Windham NH
Assignee:
Duracell Inc. - Bethel CT
International Classification:
H01M 450, H01M 442
US Classification:
429224
Abstract:
The invention relates to alkaline cells containing manganese dioxide cathode active material. A substance selected from the group of compounds CaWO. sub. 4, MgTiO. sub. 3, BaTiO. sub. 3, CaTiO. sub. 3, ZnMn. sub. 2 O. sub. 4, and Bi. sub. 12 TiO. sub. 20 is added to the cathode of conventional alkaline cells typically having an anode comprising zinc and cathode comprising manganese dioxide and an alkaline electrolyte. The additive increases the service life of the cell.
Battery Cathode
US Patent:
6143446, Nov 7, 2000
Filed:
Oct 21, 1998
Appl. No.:
9/176500
Inventors:
Stuart M. Davis - Norfolk MA
Alexander A. Leef - Waltham MA
Sandrine Colson - Paris, FR
Hana Strunc - Roslindale MA
Alexander A. Leef - Waltham MA
Sandrine Colson - Paris, FR
Hana Strunc - Roslindale MA
Assignee:
Duracell Inc. - Bethel CT
International Classification:
H01M 450
US Classification:
429224
Abstract:
A cathode that includes manganese dioxide and a titanium oxy salt, preferably titanium oxy sulfate, is disclosed.
Battery Cathode
US Patent:
7682730, Mar 23, 2010
Filed:
Mar 14, 2006
Appl. No.:
11/374674
Inventors:
Terry Copeland - Holliston MA, US
Stuart M. Davis - Norfolk MA, US
Tae-Won Lee - Pearl River NY, US
Alexander A. Leef - Waltham MA, US
Gary A. Miller - Milton MA, US
Shuming Zeng - Brookfield CT, US
Stuart M. Davis - Norfolk MA, US
Tae-Won Lee - Pearl River NY, US
Alexander A. Leef - Waltham MA, US
Gary A. Miller - Milton MA, US
Shuming Zeng - Brookfield CT, US
Assignee:
The Gillette Company - Boston MA
International Classification:
H01M 4/00, H01M 2/02, H01M 6/08
US Classification:
429128, 429165, 429164
Abstract:
A cathode having a groove extending about 10 to about 450 microns into a surface of the cathode. The cathode can also be roughened.
Battery Cathode
US Patent:
7045247, May 16, 2006
Filed:
Aug 24, 2000
Appl. No.:
09/645632
Inventors:
Terry Copeland - Holliston MA, US
Stuart M. Davis - Norfolk MA, US
Tae-Won Lee - Pearl River NY, US
Alexander A. Leef - Waltham MA, US
Gary A. Miller - Milton MA, US
Shuming Zeng - Brookfield CT, US
Stuart M. Davis - Norfolk MA, US
Tae-Won Lee - Pearl River NY, US
Alexander A. Leef - Waltham MA, US
Gary A. Miller - Milton MA, US
Shuming Zeng - Brookfield CT, US
Assignee:
The Gillette Company - Boston MA
International Classification:
H01M 4/75
US Classification:
429164, 429165, 429211, 429238
Abstract:
A cathode having a groove extending about 10 to about 450 microns into a surface of the cathode. The cathode can also be roughened.