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Official data from INPI

PROCESSO DE FORMAÇÃO DE UMA ESTRUTURA TRANÇADA; E A ESTRUTURA TRANÇADA

PublicadaInvention Patent

Application data

Number

PI8701798

Type

Invention Patent

Filing

04/14/1987

Publication

07/12/1988

Progress at the INPI

  1. Filing04/14/87
  2. Publication07/12/88
  3. Examination09/25/90
  4. Allowance04/30/91
  5. Grant11/26/91
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 07/12/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DU PONT [US]

See this company's full portfolio

Inventors

P. P. (pessoa física)

US

R. M. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

853.742 · 04/17/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

07/12/1988

RPI 925

Pedido de patente depositado

#2.1

07/28/1987

RPI 875

Carta-patente expirada

#21.1

Patente extinta em 14/04/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

11/26/1991

RPI 1095

Notificação para pagamento de retribuição

#13.1

08/13/1991

RPI 1080

Deferimento

#9.1

04/30/1991

RPI 1065

Solicitação de exame técnico

#4.1

09/25/1990

RPI 1034

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