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Official data from INPI

SUSPENSAO BOMBEAVEL TIXOTROPICA DE CIMENTO HIDRAULICO,CIMENTO DEMENSIONALMENTE ESTAVEL,COMPOSICAO AQUOSA LIQUIDA,PROCESSO DE TORNAR TIXO-TROPICO O CIMENTO PORTLAND,PROCESSO APERFEICOADO DE CIMENTACAO DE UM REVESTIMENTO DE POCO,E PROCESSO PARA VEDACAO DE UMA ZONA DE FUGA EM UMA FORMACAO SUBTERRANEA

ConcedidaInvention Patent

Application data

Number

PI7905916

Type

Invention Patent

Filing

09/18/1978

Publication

-

Progress at the INPI

  1. Filing09/18/78
  2. Publication
  3. Examination06/15/82
  4. Allowance09/08/87
  5. Grant02/23/88
  6. Terminated04/12/94

The patent was granted on 02/23/1988 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 02/23/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DOW CHEMICAL CO

See this company's full portfolio

Inventors

N. E. (pessoa física)

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

02/23/1988

RPI 905

Deferimento

#9.1

09/08/1987

RPI 881

Exigência - art. 36 da LPI

#6.1

11/25/1986

RPI 840

Exigência - art. 36 da LPI

#6.1

01/10/1984

RPI 690

6.2

03/22/1983

RPI 648

Pedido de certificado de adição de invenção

#5.1

12/07/1982

RPI 633

Solicitação de exame técnico

#4.1

06/15/1982

RPI 608

Anuidade - prazo legal encerrado

#18.2

04/12/1994

RPI 1219

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