IP Library Granted Patent US 1,121,905
Granted Patent S1
US 1,121,905 · App. 35/522,076 · Granted Apr 7, 2026

Sewage tank filter for cleaning appliance

Inventor: Huanmin Chen (Changping District, CN)
Assignee: Beijing Roborock Technology Co., Ltd.
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Quick Facts
Patent No.
US 1,121,905
App. No.
35/522,076
Granted
Apr 7, 2026
Kind
S1
Claims (1)

The ornamental design for a sewage tank filter for cleaning appliance as shown and described.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 11, 2024
From: CHEN, HUANMIN
To: BEIJING ROBOROCK TECHNOLOGY CO., LTD.
Reel/Frame 068933/0905 →
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Roborock Washable Filter Replacement for Flexi Pro and Flexi Lite . . . Vacuum Cleaner,available in Amazon.com,date 1st available Apr. 24, 2024 [online],[site visited Apr. 21, 2025 ],Available from internet URL: https:/… [cited by examiner]
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Cited By (3)
US 1,064,641 US 12,239,094 US 12,356,954