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Official data from INPI

APERFEICOAMENTO RELATIVO A VIDROS FOTOCRONICOS

Em AnáliseInvention Patent

Application data

Number

PI7700544

Type

Invention Patent

Filing

01/30/1976

Publication

-

Progress at the INPI

  1. Filing01/30/76
  2. Publication
  3. Examination
  4. Allowance
  5. Grant06/29/82
  6. Terminated12/08/87

The patent was granted on 06/29/1982 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 12/08/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

PILKINGTON BROTHERS LTD

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Inventors

B. T. (pessoa física)

O. H. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Anuidade - prazo legal encerrado

#18.2

12/08/1987

RPI 894

Concessão da patente

#16.1

06/29/1982

RPI 610

Notificação para pagamento de retribuição

#13.1

11/03/1981

RPI 576

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