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Official data from INPI

TUBO FLEXIVEL HELICOIDAL

Em AnáliseInvention Patent

Application data

Number

PI7600577

Type

Invention Patent

Filing

02/24/1975

Publication

-

Progress at the INPI

  1. Filing02/24/75
  2. Publication
  3. Examination
  4. Allowance
  5. Grant02/24/82
  6. Expired09/21/93

The letters patent expired on 09/21/1993: 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: 04/10/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

IMP EASTMAN CORP

Inventors

C. A. (pessoa física)

H. M. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.11

04/10/1984

RPI 703

Pedido de licença compulsória

#20.1

03/07/1984

RPI 698

Pedido de licença compulsória

#20.1

11/01/1983

RPI 680

Concessão da patente

#16.1

02/24/1982

RPI 592

Carta-patente expirada

#21.1

09/21/1993

RPI 1190

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