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Official data from INPI

PROCESSO PARA A NITROCARBURAÇÃO DE ELEMENTOS DE CONSTRUÇÃO DE AÇO

Arquivada/ExtintaInvention Patent

Application data

Number

PI9004967

Type

Invention Patent

Filing

10/04/1990

Publication

09/10/1991

Progress at the INPI

  1. Filing10/04/90
  2. Publication09/10/91
  3. Examination12/01/92
  4. Allowance09/15/98
  5. Grant12/29/98
  6. Expired05/21/13

The letters patent expired on 05/21/2013: 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: 05/21/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

D. A. (pessoa física)

DE

Degussa - Hüls Aktiengesellschaft

DE

Houghton Durferrit GmbH

DE

H. A. (pessoa física)

DE

See this company's full portfolio

Inventors

G. W. (pessoa física)

DE

Technical data

IPC Classification

Priority claims

DE

P 39 33 053.2 · 10/04/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 04/10/2010

05/21/2013

RPI 2211

Transferência deferida

#25.1

Transferido de: Degussa-Hüls Aktiengesellschaft.

08/22/2000

RPI 1546

Alteração de nome deferida

#25.4

Alterado de: Hüls Aktiengesellschaft

07/18/2000

RPI 1541

Transferência deferida

#25.1

Transferido de: Degussa Aktiengesellschaft

06/20/2000

RPI 1537

Concessão da patente

#16.1

12/29/1998

RPI 1460

Deferimento

#9.1

09/15/1998

RPI 1447

Exigência - art. 36 da LPI

#6.1

05/26/1998

RPI 1431

Solicitação de exame técnico

#4.1

12/01/1992

RPI 1148

Publicação do pedido de patente

#3.1

09/10/1991

RPI 1084

Pedido de patente depositado

#2.1

04/02/1991

RPI 1061

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