Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Draining valve for waste paper processing appliances

Draining valve for waste paper processing appliances

US Patent 4838301 · Granted Jun 13, 1989

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Rotor-equipped cylindrical screens1997
Rotor for pressurized hydrodynamic purification of paper pulp and equipment fitt1995
Device for separating a mixture of paper pulp and contaminants1995
Enzymatic deinking process with pH shift and addition of alkaline cellulase1994
Process of making a cylindrical slotted sieve for paper pulp strainer1994
End rim of cylindrical sieve for paper pulp strainer and classifier and process,1993
Process and device for deaeration of liquids1993
Sieve for paper pulp strainer and classifier1992
Paper pulp beater1990
Apparatus for treatment of old printed papers with short and long fiber separati1990
Screens for paper pulp purifiers1990
Pressurized mixing injector1989