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Official data from INPI

COMPOSICAO BIOCIDA PARA REVESTIMENTO DE SUPERFICIE PROCESSO DE CONTROLE DO CRESCIMENTO DE FUNGOS E BACTERIAS NA DITA COMPOSICAO E POLIOXI-METILENO-OXAZOLIDINAS

Em AnáliseInvention Patent

Application data

Number

PI7500832

Type

Invention Patent

Filing

02/15/1974

Publication

-

Progress at the INPI

  1. Filing02/15/74
  2. Publication
  3. Examination
  4. Allowance
  5. Grant01/26/82
  6. 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.

Talk to a specialist

Latest action published by the INPI: 11/01/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

TENNECO CHEMICALLS INC

Inventors

H. J. (pessoa física)

S. H. (pessoa física)

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

11/01/1983

RPI 680

Concessão da patente

#16.1

01/26/1982

RPI 588

Carta-patente expirada

#21.1

08/03/1993

RPI 1183

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