Granted Patent
Utility
US 6,644,891 · App. 09/726,414
Composition having low thermal resistivity and method for laying underground cables for carrying electrical energy
Inventors:
Danilo Caslini, Fabrizio Donazzi, Paolo Maioli
Patented Case
View Patent ↗
Granted: Nov 11, 2003
Filed: Dec 1, 2000
Inventors
Danilo Caslini
Fabrizio Donazzi
Paolo Maioli
Assignee (at issue)
Pirelli Cavi e Sistemi S.p.A.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.