Coated Or Impregnated Base (428/260) Patents (Class 442/FOR136)

Foreign Patent Art Collections

Adhesive coating or impregnation (428/261) (Class 442/FOR137)
Coating on surface of base (428/262) (Class 442/FOR138)
Wool substrate impregnated (428/270) (Class 442/FOR146)
Asbestos fiber base impregnated (428/271) (Class 442/FOR147)
Synthetic filament base impregnated (428/272) (Class 442/FOR148)
Cellulosic monolayer impregnated (428/274) (Class 442/FOR150)
Aldehyde or ketone condensation product (428/278) (Class 442/FOR154)
Quaternary ammonium compound in impregnant (428/279) (Class 442/FOR155)

There are no patents to show for this class.