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Official data from INPI

PROCESSO PARA REVESTIMENTO DE FERTILIZANTES GRANULADOS E PEROLADOS.

ConcedidaInvention Patent

Application data

Number

PI8100881

Type

Invention Patent

Filing

01/13/1981

Publication

10/13/1982

Progress at the INPI

  1. Filing01/13/81
  2. Publication10/13/82
  3. Examination01/18/83
  4. Allowance06/26/84
  5. Grant01/29/85
  6. Expired03/26/96

The letters patent expired on 03/26/1996: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 01/29/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Petróleo Brasileiro S/A - Petrobrás

RJ, BR

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Inventors

A. S. (pessoa física)

F. (pessoa física)

G. C. (pessoa física)

J. M. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

01/29/1985

RPI 745

Notificação para pagamento de retribuição

#13.1

10/23/1984

RPI 731

Deferimento

#9.1

06/26/1984

RPI 714

Solicitação de exame técnico

#4.1

01/18/1983

RPI 639

Publicação do pedido de patente

#3.1

10/13/1982

RPI 625

Carta-patente expirada

#21.1

03/26/1996

RPI 1321

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