Carta-patente expirada
#21.1
Patente extinta em 25/08/2004
12/22/2009
RPI 2033
Application data
Number
PI8904275Type
Filing
Publication
The letters patent expired on 12/22/2009: 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: 12/22/2009. We update with every new RPI gazette, published weekly.
Applicants
Minnesota Mining and Manufacturing Company
US
Inventors
J. W. (pessoa física)
US
K. P. (pessoa física)
US
IPC Classification
Priority claims
US
237,544 · 08/29/1988
Publications in the Brazilian Industrial Property Gazette (RPI).
#21.1
Patente extinta em 25/08/2004
12/22/2009
RPI 2033
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