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Official data from INPI

CENTRÍFUGA DE CISALHAMENTO

PublicadaInvention Patent

Application data

Number

PI8900818

Type

Invention Patent

Filing

02/23/1989

Publication

10/17/1989

Progress at the INPI

  1. Filing02/23/89
  2. Publication10/17/89
  3. Examination06/04/91
  4. Allowance06/01/93
  5. Grant04/26/94
  6. Expired12/15/09

The letters patent expired on 12/15/2009: 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: 10/17/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Sulzer-Escher Wyss Ag

CH

Sulzer-Escher Wyss AG

CH

Inventors

B. H. (pessoa física)

CH

Technical data

IPC Classification

Priority claims

CH

00834/88-0 · 03/07/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

10/17/1989

RPI 991

Pedido de patente depositado

#2.1

04/11/1989

RPI 964

Carta-patente expirada

#21.1

Patente extinta em 23/02/2004

12/15/2009

RPI 2032

Concessão da patente

#16.1

04/26/1994

RPI 1221

Notificação para pagamento de retribuição

#13.1

10/13/1993

RPI 1193

Deferimento

#9.1

06/01/1993

RPI 1174

Solicitação de exame técnico

#4.1

06/04/1991

RPI 1070

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