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Official data from INPI

FECHO DE JUNÇÃO

PublicadaInvention Patent

Application data

Number

PI8806510

Type

Invention Patent

Filing

12/09/1988

Publication

08/22/1989

Progress at the INPI

  1. Filing12/09/88
  2. Publication08/22/89
  3. Examination10/08/91
  4. Allowance04/05/94
  5. Grant10/25/94
  6. Expired09/02/08

The letters patent expired on 09/02/2008: 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: 08/22/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Minnesota Mining and Manufacturing Company

US

See this company's full portfolio

Inventors

K. R. (pessoa física)

US

M. R. (pessoa física)

US

W. S. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

131,758 · 12/11/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

08/22/1989

RPI 983

Pedido de patente depositado

#2.1

04/18/1989

RPI 965

Carta-patente expirada

#21.1

Patente extinta em 09/12/2003

09/02/2008

RPI 1965

Concessão da patente

#16.1

10/25/1994

RPI 1247

Notificação para pagamento de retribuição

#13.1

08/02/1994

RPI 1235

Deferimento

#9.1

04/05/1994

RPI 1218

Solicitação de exame técnico

#4.1

10/08/1991

RPI 1088

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