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Official data from INPI

Conjunto de vedação de auto - purga.

Em AnáliseInvention Patent

Application data

Number

PI7908309

Type

Invention Patent

Filing

12/18/1979

Publication

-

Progress at the INPI

  1. Filing12/18/79
  2. Publication
  3. Examination03/30/82
  4. Allowance06/14/83
  5. Grant12/27/83
  6. Expired05/02/95

The letters patent expired on 05/02/1995: 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: 11/16/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Allis - Chalmers Corporation

See this company's full portfolio

Inventors

A. B. (pessoa física)

G. E. (pessoa física)

K. H. (pessoa física)

N. J. (pessoa física)

O. J. (pessoa física)

W. I. (pessoa física)

Technical data

IPC Classification

Priority claims

US

970245 · 12/18/1978

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

11/16/1988

RPI 943

Concessão da patente

#16.1

12/27/1983

RPI 688

Notificação para pagamento de retribuição

#13.1

10/04/1983

RPI 676

Deferimento

#9.1

06/14/1983

RPI 660

Exigência - art. 36 da LPI

#6.1

10/19/1982

RPI 626

Solicitação de exame técnico

#4.1

03/30/1982

RPI 597

Carta-patente expirada

#21.1

05/02/1995

RPI 1274

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