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Official data from INPI

SEM TITULO

ConcedidaInvention Patent

Application data

Number

PI8102652

Type

Invention Patent

Filing

04/30/1981

Publication

01/26/1982

Progress at the INPI

  1. Filing04/30/81
  2. Publication01/26/82
  3. Examination04/20/82
  4. Allowance06/12/84
  5. Grant12/26/84
  6. Expired10/01/96

The letters patent expired on 10/01/1996: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 12/26/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Norton Company.

US

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Inventors

D. T. (pessoa física)

M. F. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/26/1984

RPI 740

Notificação para pagamento de retribuição

#13.1

10/02/1984

RPI 728

Deferimento

#9.1

06/12/1984

RPI 712

Solicitação de exame técnico

#4.1

04/20/1982

RPI 600

Publicação do pedido de patente

#3.1

01/26/1982

RPI 588

Carta-patente expirada

#21.1

10/01/1996

RPI 1348

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