Granted Patent
Utility
US 5,866,243 · App. 08/882,390
Composite substrate for waterproofing structure, and waterproofing method and waterproofing structure using such composite substrate
Inventors:
Yoshinobu Yasuda, Shuya Tsuji, Haruyasu Ito, Sadao Araki
Patented Case
View Patent ↗
Granted: Feb 2, 1999
Filed: Jul 10, 1997
Inventors
Yoshinobu Yasuda
Shuya Tsuji
Haruyasu Ito
Sadao Araki
Assignees (at issue)
Sowa Chemical Co., Ltd.
ASAHI FIBER GLASS CO., LTD.
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.