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Official data from INPI

SEM TITULO

Em AnáliseInvention Patent
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Application data

Number

PI7406381

Type

Invention Patent

Filing

08/02/1974

Publication

-
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Progress at the INPI

  1. Filing08/02/74
  2. Publication
  3. Examination
  4. Allowance
  5. Grant09/15/81
  6. Expired11/17/92

The letters patent expired on 11/17/1992: 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: 08/16/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Enichem Elastomers Limited

GB

Inventors

E. B. (pessoa física)

Technical data

IPC Classification

C08K 5/42C08L 13/02

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.4

08/16/1988

RPI 930

20.4

08/09/1988

RPI 929

20.6

07/05/1988

RPI 924

20.6

06/30/1987

RPI 871

Concessão da patente

#16.1

09/15/1981

RPI 569

Carta-patente expirada

#21.1

11/17/1992

RPI 1146

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