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Official data from INPI

APERFEICOAMENTO EM PROCESSO CONTINUO,EM FASE DE VAPOR,PARA FABRICACAO DE MERCAPTAN DE METILA

ConcedidaInvention Patent

Application data

Number

PI7901361

Type

Invention Patent

Filing

03/06/1978

Publication

-

Progress at the INPI

  1. Filing03/06/78
  2. Publication
  3. Examination12/01/81
  4. Allowance09/20/83
  5. Grant03/27/84
  6. Expired06/21/94

The letters patent expired on 06/21/1994: 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: 03/27/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

PENNWALT CORP

See this company's full portfolio

Inventors

B. B. (pessoa física)

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

03/27/1984

RPI 701

Notificação para pagamento de retribuição

#13.1

01/03/1984

RPI 689

Deferimento

#9.1

09/20/1983

RPI 674

Exigência - art. 36 da LPI

#6.1

03/01/1983

RPI 645

6.2

06/01/1982

RPI 606

Solicitação de exame técnico

#4.1

12/01/1981

RPI 580

Carta-patente expirada

#21.1

06/21/1994

RPI 1229

20.4

11/26/1991

RPI 1095

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