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Official data from INPI

PROCESSO DE FABRICAÇÃO DE POLIVINILBUTIRAL

DeferidaInvention Patent

Application data

Number

PI8402821

Type

Invention Patent

Filing

06/11/1984

Publication

05/21/1985

Progress at the INPI

  1. Filing06/11/84
  2. Publication05/21/85
  3. Examination07/14/87
  4. Allowance10/31/89
  5. Grant05/29/90
  6. Expired07/08/08

The letters patent expired on 07/08/2008: 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: 10/31/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

E.I.Du Pont De Nemours And Company

US

See this company's full portfolio

Inventors

R. D. (pessoa física)

FR

Technical data

Priority claims

FR

8309840 · 06/14/1983

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Deferimento

#9.1

10/31/1989

RPI 993

Exigência - art. 36 da LPI

#6.1

09/06/1988

RPI 933

Solicitação de exame técnico

#4.1

07/14/1987

RPI 873

Publicação do pedido de patente

#3.1

05/21/1985

RPI 761

Pedido de patente depositado

#2.1

08/14/1984

RPI 721

Carta-patente expirada

#21.1

Patente extinta em 11/06/99

07/08/2008

RPI 1957

Pedido de licença compulsória

#20.1

06/14/1994

RPI 1228

20.4

06/07/1994

RPI 1227

Concessão da patente

#16.1

05/29/1990

RPI 1020

Notificação para pagamento de retribuição

#13.1

03/06/1990

RPI 1008

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