Polymeric compositions for dewatering sewage sludges

Details Polymeric compositions for dewatering sewage sludges Polymeric compositions for dewatering sewage sludges

2006-08-01

2006-08-01

Egwim, Kelechi C. (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C525S215000, C525S216000, C525S916000

Reexamination Certificate

active

07084205

ABSTRACT:
Compositions comprising of blends of polymeric materials, including a cationic polymer having an intrinsic viscosity of from 8 to 17 dl/g and a cationic content of from 20 to 100% which may be used in the dewatering of thermophilic sludges.

REFERENCES:
patent: 4835206 (1989-05-01), Farrar et al.
patent: 5846433 (1998-12-01), Sorensen et al.
patent: 5906750 (1999-05-01), Haase
patent: 5938937 (1999-08-01), Sparapany et al.
patent: 2178432 (1987-02-01), None
patent: 2000218297 (2000-08-01), None
patent: 98/31748 (1998-07-01), None
patent: 98/31749 (1998-07-01), None
patent: WO 9831748 (1998-07-01), None
patent: WO 9831749 (1998-07-01), None
patent: 01/12778 (2001-02-01), None
Derwent Abstract 2000-574778 for JP 2000 218297, Aug. 8, 2000.

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