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Official data from INPI

PROCESSO PARA A RECUPERAÇÃO E REGENERAÇÃO DE ÁCIDO NÍTRICO

Arquivada/ExtintaInvention Patent

Application data

Number

PI9004157

Type

Invention Patent

Filing

08/22/1990

Publication

11/12/1991

Progress at the INPI

  1. Filing08/22/90
  2. Publication11/12/91
  3. Examination11/16/93
  4. Allowance07/09/96
  5. Grant11/24/98
  6. Expired01/29/13

The letters patent expired on 01/29/2013: 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: 01/29/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Air Products And Chemicals, Inc

US

See this company's full portfolio

Inventors

C. M. (pessoa física)

US

D. P. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

399,654 · 08/28/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 22/08/2010

01/29/2013

RPI 2195

Concessão da patente

#16.1

11/24/1998

RPI 1455

Notificação para pagamento de retribuição

#13.1

09/23/1997

RPI 1399

Deferimento

#9.1

07/09/1996

RPI 1336

Exigência - art. 36 da LPI

#6.1

01/16/1996

RPI 1311

Solicitação de exame técnico

#4.1

11/16/1993

RPI 1198

Publicação do pedido de patente

#3.1

11/12/1991

RPI 1093

Pedido de patente depositado

#2.1

02/26/1991

RPI 1056

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