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Official data from INPI

COMPOSIÇÕES DE LIGANTE PARA CIMENTO PORTLAND E COMPOSIÇÃO DE CIMENTO

Em AnáliseInvention Patent

Application data

Number

PI8605352

Type

Invention Patent

Filing

10/30/1986

Publication

05/31/1988

Progress at the INPI

  1. Filing10/30/86
  2. Publication05/31/88
  3. Examination10/11/88
  4. Allowance10/05/93
  5. Grant05/31/94
  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: 10/11/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Lone Star Industries, Inc

US

Inventors

J. S. (pessoa física)

US

M. F. (pessoa física)

US

R. H. (pessoa física)

US

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

10/11/1988

RPI 938

Publicação do pedido de patente

#3.1

05/31/1988

RPI 919

Pedido de patente depositado

#2.1

04/14/1987

RPI 860

Carta-patente expirada

#21.1

Patente extinta em 30/10/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

05/31/1994

RPI 1226

Deferimento

#9.1

10/05/1993

RPI 1192

Exigência - art. 36 da LPI

#6.1

08/11/1992

RPI 1132

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