Solicitação de exame técnico
#4.1
08/11/1987
RPI 877
Application data
Number
PI8604094Type
Filing
Publication
The letters patent expired on 12/05/2012: 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: 08/11/1987. We update with every new RPI gazette, published weekly.
Applicants
E. C. (pessoa física)
US
Union Oil Company of California
US
Inventors
D. Y. (pessoa física)
US
IPC Classification
Priority claims
US
771.260 · 08/30/1985
US
890.076 · 07/24/1986
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