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Inventor

Douglas W. Townsend

Inventor
Glen Burnie, MD, US

Overview

15→
Patents
1976–2011
Patent span
Chemistry
Primary field (CPC C)

Patents· 15 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

C25Cprimary
C25CProcesses for the electrolytic production, recovery or refining of metals30%
C25DProcesses for the electrolytic or electrophoretic production of coatings20%
C04BLime, magnesia13%
C23CCoating metallic material10%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests7%
C02FTreatment of water, waste water, sewage, or sludge3%
C22BProduction and refining of metals3%
E02DFoundations3%
E03FSewers3%
F16BDevices for fastening or securing constructional elements or machine parts together, e.g. nails, bolts, circlips, clamps, clips or wedges3%
PatentTitleYear
7,878,748'Threaded fasteners with ribbed shanks'20115,227,045'Supersaturation coating of cathode substrate'19935,158,655'Coating of cathode substrate during aluminum smelting in drained cathode cells'19925,028,301'Supersaturation plating of aluminum wettable cathode coatings during aluminum smelting in drained cathode cells'19914,949,626'Protective system'19904,795,540'Slotted cathode collector bar for electrolyte reduction cell'19894,624,766'Aluminum wettable cathode material for use in aluminum reduction cell'19864,544,469'Aluminum cell having aluminum wettable cathode surface'19854,526,911'Aluminum cell cathode coating composition'19854,466,995'Control of ledge formation in aluminum cell operation'19844,466,996'Aluminum cell cathode coating method'19844,235,692'Electrolytic apparatus'19804,088,548'Electrolytic method and apparatus for refractory metals using a hollow carbon electrode'19784,028,236'Recovery of mercury'19773,979,267'Electrolytic method'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976–2011Patents assigned to TOWNSEND DOUGLAS W (7)· patent assignee history
1976–1977Based in Port Credit, CA· patent location history
1978Based in Ontario, CA· patent location history
1980Based in Mississauga, CA· patent location history
1984Patents assigned to MARTIN MARIETTA CORP (2)· patent assignee history
1984–1993Based in Glen Burnie, MD, US· patent location history
1985–1986Patents assigned to COMMW ALUMINIUM CORP (2)· patent assignee history
1985Patents assigned to MARTIN MARIETTA ALUMINUM (1)· patent assignee history
1989Patents assigned to COMALCO ALUMINUM LTD (1)· patent assignee history
2011Based in Annapolis, MD, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
TOWNSEND DOUGLAS Wself71976–2011
COMMW ALUMINIUM CORP21985–1986
MARTIN MARIETTA CORP21984
COMALCO ALUMINUM LTD11989
MARTIN MARIETTA ALUMINUM11985
Locations
LocationPatentsSpan
Glen Burnie, Maryland, US101984–1993
Port Credit, CA21976–1977
Annapolis, Maryland, US12011
Mississauga, CA11980
Ontario, CA11978