Official data from INPI

MISTURA QUE CONTEM 80 A 99,8% EM PESO DE UM COPOLIESTER

Em AnáliseInvention Patent

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Application data

Number

PI7603244

Type

Invention Patent

Filing

05/23/1975

Publication

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Progress at the INPI

Filing05/23/75
Publication
Examination
Allowance
Grant
Expired08/03/93

The letters patent expired on 08/03/1993: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 09/30/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DU PONT

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Inventors

S. A. (pessoa física)

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Cessão de direito de exploração

#22.1

09/30/1986

RPI 832

Carta-patente expirada

#21.1

08/03/1993

RPI 1183

From the same holder

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