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Official data from INPI

APARELHO PARA SUPERVISÃO DE SISTEMA DE RELÉ DE PRESSÃO SÚBITA

Em AnáliseInvention Patent

Application data

Number

PI8601139

Type

Invention Patent

Filing

02/25/1986

Publication

11/25/1986

Progress at the INPI

  1. Filing02/25/86
  2. Publication11/25/86
  3. Examination11/22/88
  4. Allowance09/03/91
  5. Grant08/25/92
  6. Expired07/22/08

The letters patent expired on 07/22/2008: 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: 11/22/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

W. C. (pessoa física)

US

See this company's full portfolio

Inventors

H. L. (pessoa física)

US

W. E. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

704993 · 02/25/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

11/22/1988

RPI 944

Publicação do pedido de patente

#3.1

11/25/1986

RPI 840

Pedido de patente depositado

#2.1

08/26/1986

RPI 827

Carta-patente expirada

#21.1

Patente extinta em 25/02/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

08/25/1992

RPI 1134

Notificação para pagamento de retribuição

#13.1

01/07/1992

RPI 1101

Deferimento

#9.1

09/03/1991

RPI 1083

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