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Inventor

James D. Snodgrass

Inventor
Darien, IL, US

Overview

2→
Patents
1976–1977
Patent span
Chemistry
Primary field (CPC C)

Patents· 2 as inventor

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

C02Fprimary
C02FTreatment of water, waste water, sewage, or sludge67%
E03DWater-closets or urinals with flushing devices33%
PatentTitleYear
4,013,557'Sewage treatment apparatus'19773,975,256'Apparatus for treatment of aqueous sewage composition'1976

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1976Patents assigned to HEDS INC (1)· patent assignee history
1976–1977Based in Darien, IL, US· patent location history
1977Patents assigned to SLOAN VALVE CO (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
HEDS INC11976
SLOAN VALVE CO11977
Locations
LocationPatentsSpan
Darien, Illinois, US21976–1977