David J. Derwin

City:

Prospect Heights, Illinois

Country:

United States

Published Applications:

Last publication date:

2014-09-18

Top Assignees for applications by David J. Derwin

The entities that hold a legal rights for patent applications filed by inventor Derwin David J.:

SUPERIOR GRAPHITE CO. 3 Chicago, IL United States

Recent patent applications by Derwin David J.

David J. Derwin from Prospect Heights, US has applied for patents for these inventions. The list has both pending applications and granted patents:

#1 | 2014-09-18

US20140274816A1

Chemistry; metallurgy

Drilling fluid additive for loss circulation and wellbore strengthening

#2 | 2013-12-31

US13763276

Cement compositions including resilient graphitic carbon fraction

#3 | 2005-12-06

US10416670

Electrically conductive pavement mixture

InventorID:

2963127 ⎘