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Official data from INPI

PROCESSO PARA DESSULFURIZAÇÃO DE GESSO

PublicadaInvention Patent

Application data

Number

PI8705952

Type

Invention Patent

Filing

11/05/1987

Publication

06/14/1988

Progress at the INPI

  1. Filing11/05/87
  2. Publication06/14/88
  3. Examination09/25/90
  4. Allowance08/30/94
  5. Grant04/25/95
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 06/14/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Florida Institute Of Phosphate Research

US

Inventors

G. J. (pessoa física)

US

J. M. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

927.439 · 11/06/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

06/14/1988

RPI 921

Pedido de patente depositado

#2.1

02/23/1988

RPI 905

Carta-patente expirada

#21.1

Patente extinta em 05/11/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

04/25/1995

RPI 1273

Notificação para pagamento de retribuição

#13.1

01/03/1995

RPI 1257

Deferimento

#9.1

08/30/1994

RPI 1239

Exigência - art. 36 da LPI

#6.1

06/21/1994

RPI 1229

Conhecimento de parecer técnico

#7.1

01/25/1994

RPI 1208

Solicitação de exame técnico

#4.1

09/25/1990

RPI 1034

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