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Official data from INPI

PROCESSO PARA PREPARAÇÃO DE UM POLIÉSTER DISPERSÍVEL EM ÁGUA

ConcedidaInvention Patent

Application data

Number

PI8304965

Type

Invention Patent

Filing

09/14/1983

Publication

09/04/1984

Progress at the INPI

  1. Filing09/14/83
  2. Publication09/04/84
  3. Examination10/07/86
  4. Allowance09/06/88
  5. Grant07/25/89
  6. Expired07/01/08

The letters patent expired on 07/01/2008: 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: 07/25/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Shell Internationale Research Maatschappij B.V

NL

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Inventors

W. T. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

425.146 · 09/28/1982

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/25/1989

RPI 979

Notificação para pagamento de retribuição

#13.1

12/27/1988

RPI 949

Deferimento

#9.1

09/06/1988

RPI 933

Solicitação de exame técnico

#4.1

10/07/1986

RPI 833

Publicação do pedido de patente

#3.1

09/04/1984

RPI 724

Pedido de patente depositado

#2.1

11/08/1983

RPI 681

Carta-patente expirada

#21.1

Patente extinta em 14/09/98

07/01/2008

RPI 1956

Pedido de licença compulsória

#20.1

11/09/1993

RPI 1197

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