US PATENT SUBCLASS 15 / 250.4
.~.~.~ Supplemental cleaning means brought into surface contact

Current as of: June, 1999
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15 /   HD   BRUSHING, SCRUBBING, AND GENERAL CLEANING

246  DF  ATTACHMENTS {8}
250.001  DF  .~ Optical-member-attachable cleaner (e.g., windshield wiper) {28}
250.361  DF  .~.~ Cleaning element structure {7}
250.4.~.~.~ Supplemental cleaning means brought into surface contact

DEFINITION

Classification: 15/250.4

(under subclass 250.361) Cleaners comprising at least one cleaning edge which is maintained in contact with the surface to be cleaned during the "at-rest" position of the cleaning element and at least one additional cleaning means which is out of contact during the "at-rest" position, the additional means being adapted to be brought into surface contact during abnormal conditions or during movement of the cleaning element over the surface to be cleaned.