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Official data from INPI

AÇO-LIGA APRESENTANDO GRAU DE NITRIFICAÇÃO E ARTIGO DE AÇO-LIGA

Em AnáliseInvention Patent
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Application data

Number

PI8407278

Type

Invention Patent

Filing

02/13/1984

Publication

01/21/1986
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Progress at the INPI

  1. Filing02/13/84
  2. Publication01/21/86
  3. Examination10/06/87
  4. Allowance02/18/92
  5. Grant11/24/92
  6. Expired07/08/08

The letters patent expired on 07/08/2008: 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: 04/12/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Caterpillar, Inc.

US

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Inventors

C. L. (pessoa física)

US

Technical data

IPC Classification

C22C 38/38

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

14.1

04/12/1988

RPI 912

Solicitação de exame técnico

#4.1

10/06/1987

RPI 885

Notificação de entrada na fase nacional - PCT

#1.3

01/21/1986

RPI 796

Carta-patente expirada

#21.1

Patente extinta em 13/02/99

07/08/2008

RPI 1957

Concessão da patente

#16.1

11/24/1992

RPI 1147

Notificação para pagamento de retribuição

#13.1

07/28/1992

RPI 1130

Deferimento

#9.1

02/18/1992

RPI 1107

Exigência - art. 36 da LPI

#6.1

05/28/1991

RPI 1069

Exigência - art. 36 da LPI

#6.1

08/28/1990

RPI 1030

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