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Official data from INPI

PROCESSO CONTÍNUO PARA A PREPARAÇÃO DE ÁLCOOL POLIVINÍLICO

ConcedidaInvention Patent

Application data

Number

PI8104392

Type

Invention Patent

Filing

07/09/1981

Publication

03/30/1982

Progress at the INPI

  1. Filing07/09/81
  2. Publication03/30/82
  3. Examination12/13/83
  4. Allowance12/29/87
  5. Grant11/28/89
  6. Expired10/08/96

The letters patent expired on 10/08/1996: 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: 11/28/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

H. A. (pessoa física)

DE

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Inventors

D. R. (pessoa física)

DE

D. R. (pessoa física)

DE

H. J. (pessoa física)

DE

Technical data

IPC Classification

Priority claims

DE

P 30 26 144.0 · 07/10/1980

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

11/28/1989

RPI 997

110

09/26/1989

RPI 988

120

02/28/1989

RPI 958

Recurso

#12.1

05/10/1988

RPI 916

Deferimento

#9.1

12/29/1987

RPI 897

Conhecimento de parecer técnico

#7.1

12/31/1985

RPI 793

Pedido de certificado de adição de invenção

#5.1

05/02/1984

RPI 706

Solicitação de exame técnico

#4.1

12/13/1983

RPI 686

Publicação do pedido de patente

#3.1

03/30/1982

RPI 597

Carta-patente expirada

#21.1

10/08/1996

RPI 1349

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