Term ended Aug 19, 2025 · Medium confidence
20-year base term ended Mar 24, 2024
Why Medium: A parent in the chain could not be resolved.
USPTO later recorded it as expired for non-payment on Oct 27, 2025.
Held by Amazon Technologies, Inc.
Filed Aug 5, 2009 as application 12/536,407 · Granted Sep 24, 2013
Base term plus 513 days of patent term adjustment (USPTO delay)
Today
Term ended Aug 19, 2025
2004
2026
Clock starts
Mar 24, 2004
Mar 24, 2004
Term ended
Aug 19, 2025
Aug 19, 2025
Granted
Sep 24, 2013
Sep 24, 2013
base term
patent term adjustment
after the term ends
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
513
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
2 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
16
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 513 days past its 20-year base term on prosecution delay. Confidence: Medium. 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.
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Mar 24, 2004, when application 10/809,049, the earliest non-provisional in its chain, was filed (this one was filed Aug 5, 2009); a parent in its chain could not be resolved (the next row) | Mar 24, 2024 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +513 days, USPTO patent term adjustment record | Aug 19, 2025 | High confidence |
| Terminal disclaimer cap | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 2 maintenance fees paid | term ended | High confidence |
| USPTO status record | Recorded as expired for non-payment on Oct 27, 2025, after the term ended | no change | High confidence |
| Computed term end | The steps above, in order | Aug 19, 2025 | Medium confidence |
This family
| US 7,155,336 | Term ended Aug 2024 | Aug 2024 |
| US 7,359,797 | Term ended Oct 2024 | Oct 2024 |
| Application PCT/US2005/009942 | PCT application no patent term | no patent term |
| US 7,272,501 | Term ended Mar 2024 | Mar 2024 |
| US 7,587,276 | Term ended Sep 2024 | Sep 2024 |
| US 8,572,077 | Term ended no later than Jun 2025 | no later than Jun 2025 |
| US 7,756,630 | Term ended Mar 2024 | Mar 2024 |
| US 8,543,323 | this patent Aug 2025 | Aug 2025 |
8 of 16 applications in this family shown, earliest filings first. 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.
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Oct 13, 2024 Reel 69167, frame 493 | A9.com, Inc. | Amazon Technologies, Inc. | Assignment of Assignor's 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.
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Alerts on its grants, lapses and transfers.
What's changing
Note
The 513 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
43
later US patents cite this one
That is top 25% of utility patents granted in 2013 in our data, the only group it is compared against.
How we rank
Every date shows its work: the base term, any term adjustment or extension, any disclaimer cap, and the maintenance fee record, each with a confidence tier. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.