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Official data from INPI

PROCESSO APERFEICOADO PARA RECUPERACAO DE OXIDO DE ETILENO DE EFLUENTE GASOSO DA REACAO,PRODUZIDO NA OXIDACAO PARCIAL DE ETILENO

Em AnáliseInvention Patent

Application data

Number

PI7601769

Type

Invention Patent

Filing

03/24/1975

Publication

-

Progress at the INPI

  1. Filing03/24/75
  2. Publication
  3. Examination
  4. Allowance
  5. Grant
  6. Expired09/21/93

The letters patent expired on 09/21/1993: 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: 10/31/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

HALCON INTERNATIONAL INC

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Inventors

O. B. (pessoa física)

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

10/31/1989

RPI 993

20.4

10/24/1989

RPI 992

Pedido de licença compulsória

#20.1

10/17/1989

RPI 991

Carta-patente expirada

#21.1

09/21/1993

RPI 1190

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