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Official data from INPI

APARELHO ÚTIL PARA DISPERSAR SEDIMENTOS EM UM TANQUE DE ARMAZENAGEM E APARELHO E PROCESSO PARA DISPERSAR A BORRA DE HIDROCARBONETO EM UM TANQUE DE ARMAZENAGEM

Arquivada/ExtintaInvention PatentPCT · US1989001034

Application data

Number

PI8907359

Type

Invention Patent

Filing

03/15/1989

Publication

03/26/1991

PCT

US1989001034

Progress at the INPI

  1. Filing03/15/89
  2. Publication03/26/91
  3. Examination10/15/91
  4. Allowance04/13/93
  5. Grant09/28/93
  6. Expired12/29/09

The letters patent expired on 12/29/2009: 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: 12/29/2009. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Serv-Tech, Inc.

US

Inventors

R. K. (pessoa física)

US

R. C. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

180,334 · 04/11/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 15/03/2004

12/29/2009

RPI 2034

Concessão da patente

#16.1

09/28/1993

RPI 1191

Notificação para pagamento de retribuição

#13.1

08/03/1993

RPI 1183

Deferimento

#9.1

04/13/1993

RPI 1167

Exigência - art. 36 da LPI

#6.1

09/22/1992

RPI 1138

Solicitação de exame técnico

#4.1

10/15/1991

RPI 1089

Notificação de entrada na fase nacional - PCT

#1.3

03/26/1991

RPI 1060

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