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Official data from INPI

COMPOSICAO DE REVESTIMENTO COM ALTO TEOR DE SOLIDOS

ConcedidaInvention Patent

Application data

Number

PI8003780

Type

Invention Patent

Filing

03/07/1980

Publication

-

Progress at the INPI

  1. Filing03/07/80
  2. Publication
  3. Examination02/24/82
  4. Allowance07/14/87
  5. Grant12/29/87
  6. Terminated09/25/90

The patent was granted on 12/29/1987 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: 12/29/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DU PONT

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Inventors

R. K. (pessoa física)

T. R. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/29/1987

RPI 897

Notificação para pagamento de retribuição

#13.1

11/10/1987

RPI 890

Deferimento

#9.1

07/14/1987

RPI 873

Conhecimento de parecer técnico

#7.1

04/05/1983

RPI 650

Solicitação de exame técnico

#4.1

02/24/1982

RPI 592

Anuidade - prazo legal encerrado

#18.2

09/25/1990

RPI 1034

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