Johannes Lefferts

Person

Enschede, NL

People

Patents Grantslast 30 patents

Information Patent Grant
Spiral link belt with low permeability to air and method for its pr...
- Patent number 5,514,456
- Issue date May 7, 1996
- SITEG Siebtechnik GmbH
- Johannes Lefferts
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Double helix, method of making same and spiral link belt made there...
- Patent number 5,183,442
- Issue date Feb 2, 1993
- SITEG Siebtechnik GmbH
- Johannes Lefferts
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Spiral link belt with composite helices
- Patent number 4,796,749
- Issue date Jan 10, 1989
- Siteg Siebtechnik GmbH
- Johannes Lefferts
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Spiral link belt of reduced air permeability and method of producin...
- Patent number 4,696,852
- Issue date Sep 29, 1987
- SITEG Siebtechnik GmbH
- Johannes Lefferts
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Helix structures for use in forming helix belts
- Patent number 4,650,709
- Issue date Mar 17, 1987
- Siteg Siebtechnik GmbH
- Johannes Lefferts
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Double helix, spiral belts made therefrom
- Patent number 4,575,472
- Issue date Mar 11, 1986
- Siteg Siebtechnik GmbH
- Johannes Lefferts
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method for producing helix structures for use in forming helix belts
- Patent number 4,564,992
- Issue date Jan 21, 1986
- Siteg Siebtechnik GmbH
- Johannes Lefferts
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Apparatus for joining the ends of a belt to make it endless
- Patent number 4,451,957
- Issue date Jun 5, 1984
- Steg Siebtechnik GmbH
- Johannes Lefferts
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Method for producing a sieve belt of thermosettable synthetic resin...
- Patent number 4,392,902
- Issue date Jul 12, 1983
- Steg Siebtechnik GmbH
- Johannes Lefferts
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Sieve belt with filler material
- Patent number 4,362,776
- Issue date Dec 7, 1982
- SITEG Siebtechnik GmbH
- Johannes Lefferts
- D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
Information Patent Grant
Sieve belt of thermosettable synthetic resin helices for papermakin...
- Patent number 4,346,138
- Issue date Aug 24, 1982
- SITEG Siebtechnik GmbH
- Johannes Lefferts
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Johannes Lefferts

Person

Patents Grantslast 30 patents

Spiral link belt with low permeability to air and method for its pr...

Double helix, method of making same and spiral link belt made there...

Spiral link belt with composite helices

Spiral link belt of reduced air permeability and method of producin...

Helix structures for use in forming helix belts

Double helix, spiral belts made therefrom

Method for producing helix structures for use in forming helix belts

Apparatus for joining the ends of a belt to make it endless

Method for producing a sieve belt of thermosettable synthetic resin...

Sieve belt with filler material

Sieve belt of thermosettable synthetic resin helices for papermakin...