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Official data from INPI

PROCESSO DE PREPARAÇÃO DE UM PÓ DE CARBONETO DE TUNGSTÊNIO, E, PÓ DE CARBONETO DE TUNGSTÊNIO

Prazo de SigiloInvention Patent

Application data

Number

PI8902532

Type

Invention Patent

Filing

06/02/1989

Publication

01/23/1990

Progress at the INPI

  1. Filing06/02/89
  2. Publication01/23/90
  3. Examination11/19/91
  4. Allowance10/06/98
  5. Grant02/23/99
  6. Expired12/26/12

The letters patent expired on 12/26/2012: 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: 07/11/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Sulzer Metco (US) Inc.

US

T. C. (pessoa física)

US

See this company's full portfolio

Inventors

M. D. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

201,507 · 06/02/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

07/11/1989

RPI 977

Carta-patente expirada

#21.1

Patente extinta em 02/06/2009

12/26/2012

RPI 2190

Transferência deferida

#25.1

Transferido de: The Perkin-Elmer Corporation

11/13/2001

RPI 1610

Concessão da patente

#16.1

02/23/1999

RPI 1468

Republicação - classificação IPC

#15.11

Alterada Classificação Int. Cl. 5 C04B 35/36

10/06/1998

RPI 1450

Deferimento

#9.1

10/06/1998

RPI 1450

Exigência - art. 36 da LPI

#6.1

09/30/1997

RPI 1400

Pedido de certificado de adição de invenção

#5.1

03/24/1992

RPI 1112

Solicitação de exame técnico

#4.1

11/19/1991

RPI 1094

Publicação do pedido de patente

#3.1

01/23/1990

RPI 1003

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