Assignee
GREFCO
US23 patents
Top patents by PatentIndex Score
US5002696AMar 26, 1991
Expanded mineral particles and apparatus and method of production
GREFCO70 citations96
US4067155AJan 10, 1978
Sealing system
GREFCO387 citations96
US4313997AFeb 2, 1982
Perlite boards and method for making same
GREFCO64 citations93
US4255489AMar 10, 1981
Perlite filler
GREFCO35 citations92
US4183980AJan 15, 1980
Perlite filler coated with polydimethylsiloxane
GREFCO33 citations92
US4063395ADec 20, 1977
Twin membrane, self sealing, mechanically fastened insulated roof deck system
GREFCO86 citations92
US4059933ANov 29, 1977
Strip for fastening and sealing sheets of construction material
GREFCO99 citations90
US4057908ANov 15, 1977
Method and apparatus for drying damp powder
GREFCO34 citations89
US4142968AMar 6, 1979
Diatomaceous earth filteraid and method for its manufacture
GREFCO25 citations78
US3978264AAug 31, 1976
Coating for porous surfaces
GREFCO21 citations78
US3958373AMay 25, 1976
Twin membrane, self sealing, mechanically fastened insulated roof deck system
GREFCO22 citations78
US4059231ANov 22, 1977
Method and apparatus for selectively comminuting particles of a frangible material
GREFCO27 citations74
US3952830AApr 27, 1976
Mineral aggregate (perlite) acoustical board
GREFCO29 citations72
US4302344ANov 24, 1981
Loose-fill, thermal insulation
GREFCO13 citations69
US4212755AJul 15, 1980
Settle resistant loose-fill perlite insulation comprising particles rendered slightly tacky by a coating thereon
GREFCO12 citations69
US4187174AFeb 5, 1980
Diatomaceous earth filteraid and method for its manufacture
GREFCO13 citations69
US4110501AAug 29, 1978
Splicing strip
GREFCO11 citations68
US4073673AFeb 14, 1978
Process for producing an expansion joint cover
GREFCO14 citations68
US4071993AFeb 7, 1978
Construction material in sheet form and method of joining sheets edge-to-edge
GREFCO8 citations64
US4011183AMar 8, 1977
Building board products and process for producing same
GREFCO10 citations59
US4671973AJun 9, 1987
Method for the treatment of mineral extender fillers
GREFCO6 citations58
US4145284AMar 20, 1979
Method for making polymeric filter aids and products thereof
GREFCO2 citations54
US4521182AJun 4, 1985
Method and apparatus for heating particulate material
GREFCO5 citations46