Exigência - art. 36 da LPI
#6.1
10/03/1989
RPI 989
Application data
Number
PI8500339Type
Filing
Publication
The letters patent expired on 07/15/2008: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.
Talk to a specialistLatest action published by the INPI: 10/03/1989. We update with every new RPI gazette, published weekly.
Applicants
Nalco Chemical Company
US
Inventors
D. R. (pessoa física)
US
M. B. (pessoa física)
US
IPC Classification
Priority claims
US
574.324 · 01/27/1984
US
625.476 · 06/25/1984
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