The Patent Finder
US

Modular Pet Litter Box System

US 11,206,806 In force
OverviewFamilyAssignmentsSources & methods
Collateral for a security interest recorded Mar 29, 2022 (KKR Loan Administration Services LLC).

Term ends May 29, 2040 · High confidence

Filed Dec 5, 2019 as application 16/705,086 · Granted Dec 28, 2021
Base term plus 176 days of patent term adjustment (USPTO delay)
Today
20 years from filing
2019 2040
Clock starts
Dec 5, 2019
Term ends
May 29, 2040
Granted
Dec 28, 2021
base term patent term adjustment fee events Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
176
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
1 of 3
Maintenance fees paid
Three maintenance fees fall due, at 3.5, 7.5 and 11.5 years from grant. This counts the ones the record shows paid.
3
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.

This patent's term runs 176 days past its 20-year base term on prosecution delay. 1 of 3 maintenance fees is paid so far. Confidence: High. from the record

How we calculated this date

One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.
StepInputDate after this stepConfidence
Base term, 20 years from filingClock starts Dec 5, 2019, when this application, 16/705,086, was filedDec 5, 2039High confidence
Continuity chainEvery parent in the chain resolvedno changeHigh confidence
Patent term adjustment+176 days, USPTO patent term adjustment recordMay 29, 2040High confidence
Terminal disclaimer capNone on recordno cap appliedHigh confidence
Patent term extensionNone on fileno changeHigh confidence
Fee events1 of 3 maintenance fees paidIn forceHigh confidence
Computed term endThe steps above, in orderMay 29, 2040High confidence

This family

US 11,206,806this patent
May 2040
May 2040
Application 17/562,739Abandoned
not computed
not computed
Application 19/257,207Pending
not computed
not computed
The applications whose file history this site holds. The family may have others.

Assignments

Assignment documents as recorded at the USPTO, oldest first, with the reel and frame each was recorded at. A recorded assignment is a filed document, not a statement of current ownership, and the absence of a later one is not evidence that the last one still stands.
RecordedAssignorAssigneeConveyance
Feb 24, 2020
Reel 51901, frame 587
Van Wert, CarrieCreative Petworks LLCAssignment of Assignor's Interest
Jan 27, 2022
Reel 58798, frame 845
Creative Petworks LLCWorldwise, Inc.Assignment of Assignor's Interest
Mar 29, 2022
Reel 60249, frame 440
Worldwise, Inc.; Quaker Pet Group, Inc.; Furhaven Pet Products, Inc.KKR Loan Administration Services LLCSecurity Interest

Sources

Google Patents · The patent document at USPTO · Assignment records at USPTO

USPTO account required: This application in Patent Center · USPTO's maintenance fee lookup

Maintenance fee events come from USPTO's own fee records. Its fee lookup asks for the patent number and the application number.

The Patent Finder CompaniesExpirationsCalculatorWatchlistPricing MethodologyCorrectionsLegalPrivacysupport@thepatentfinder.com Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited