Carta-patente expirada
#21.1
Patente extinta em 14/05/2012
06/25/2013
RPI 2216
Application data
Number
PI9201930Type
Filing
Publication
The letters patent expired on 06/25/2013: 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: 06/25/2013. We update with every new RPI gazette, published weekly.
Applicants
American Cyanamid Company
US
Inventors
H. H. (pessoa física)
US
M. L. (pessoa física)
US
IPC Classification
Priority claims
US
07/704,476 · 05/23/1991
Abstract
Soluções aquosas de polímeros contendo hidroxilamina são estabilizadas contra a degradação de viscosidade por adição de um estabilizante.
Publications in the Brazilian Industrial Property Gazette (RPI).
#21.1
Patente extinta em 14/05/2012
06/25/2013
RPI 2216
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07/27/1999
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02/17/1999
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03/07/1995
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