Inventor
Marc L. Syvertsen
Inventor
Madison, WI, US
Overview
Patents· 8 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
H01Mprimary
H01MProcesses or means, e.g. batteries, for the direct conversion of chemical energy into electrical energy47%
Y02EReduction of greenhouse gas [ghg] emissions, related to energy generation, transmission or distribution47%
B65DContainers for storage or transport of articles or materials, e.g. bags, barrels, bottles, boxes, cans, cartons, crates, drums, jars, tanks, hoppers, forwarding containers7%
PatentTitleYear
11,031,644Metal-air cells with minimal air access202110,320,041Zinc-air battery surfactants20198,003,251'Electrochemical cell grommet having a sidewall with a nonuniform thickness'20117,651,814'Electrochemical cell having improved radial seal'20107,288,920'Method and apparatus for regulating charging of electrochemical cells'20076,938,775'Button cell battery pack with air access channel'20056,878,481'Method and apparatus for regulating charging of electrochemical cells'20056,794,074'Air manager for metal-air cells'2004Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
2004–2005Patents assigned to RAY O VAC CORP (2)· patent assignee history
2004–2019Based in Madison, WI, US· patent location history
2005–2011Patents assigned to ROVCAL INC (3)· patent assignee history
2007Patents assigned to SPECTRUM BRANDS INC FKA RAYOVA (1)· patent assignee history
2019–2021Patents assigned to ENERGIZER BRANDS LLC (2)· patent assignee history
2019Patents assigned to SPECTRUM BRANDS (1)· patent assignee history
2021Based in Middleton, WI, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| ROVCAL INC | 3 | 2005–2011 |
| ENERGIZER BRANDS LLC | 2 | 2019–2021 |
| RAY O VAC CORP | 2 | 2004–2005 |
| SPECTRUM BRANDS | 1 | 2019 |
| SPECTRUM BRANDS INC FKA RAYOVA | 1 | 2007 |
Locations
| Location | Patents | Span |
|---|---|---|
| Madison, WI, US | 7 | 2004–2019 |
| Middleton, WI, US | 1 | 2021 |