Also listed on Glitter Technology LLP, an earlier holder on the record. The recorded assignments below show how it moved.

Term ends Dec 1, 2030 · High confidence

Computed 20-year base term

Held by Xero Limited

Filed Sep 1, 2009 as application 12/551,790 · Granted Feb 5, 2013

Base term plus 456 days of patent term adjustment (USPTO delay)

Today

20 years from filing

Term ends Dec 1, 2030

2009 2030

Clock starts
Sep 1, 2009

Term ends
Dec 1, 2030

Granted
Feb 5, 2013

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

456

Days of term adjustment

Read from the USPTO patent term adjustment record, not recalculated here.

None

Terminal disclaimer

No disclaimer on this record.

3 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.

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 456 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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.

Step	Input	Date after this step	Confidence
Base term, 20 years from filing	Clock starts Sep 1, 2009, when this application, 12/551,790, was filed	Sep 1, 2029	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+456 days, USPTO patent term adjustment record	Dec 1, 2030	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	3 of 3 maintenance fees paid	In force	High confidence
Computed term end	The steps above, in order	Dec 1, 2030	High confidence

This family

US 8,370,307	this patent Dec 2030	Dec 2030
US 8,725,697	In force Sep 2029	Sep 2029
US 9,330,137	In force Sep 2029	Sep 2029
US 10,860,432	In force Sep 2029	Sep 2029

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
Dec 6, 2011 reel/frame not recorded	Wolfe, Andrew	Empire Technology Development LLC	Assignment of Assignor's Interest
Dec 6, 2011 reel/frame not recorded	Wolfe, Andrew	Glitter Technology LLP	Assignment of Assignor's Interest
Dec 6, 2011 Reel 27332, frame 557	Wolfe, Andrew	Empire Technology Development LLC; Glitter Technology LLP	Assignment of Assignor's Interest
Apr 25, 2012 Reel 28103, frame 612	Intellectual Ventures Asia Pte. Ltd.	Empire Technology Development LLC	Assignment of Assignor's Interest
Apr 25, 2012 Reel 28105, frame 148	Glitter Technology LLP	Intellectual Ventures Asia Pte. Ltd.	Attestation Regarding Assignment
Apr 7, 2016 Reel 38221, frame 965	Wolfe, Andrew	Empire Technology Development LLC	Assignment of Assignor's Interest
Apr 7, 2016 Reel 38222, frame 503	Wolfe, Andrew	Glitter Technology LLP	Assignment of Assignor's Interest
Apr 7, 2016 Reel 38222, frame 815	Intellectual Ventures Asia Pte. Ltd.	Empire Technology Development LLC	Assignment of Assignor's Interest
May 26, 2016 Reel 38725, frame 871	Wolfe, Andrew	Glitter Technology LLP	Assignment of Assignor's Interest
May 26, 2016 Reel 38726, frame 80	Glitter Technology LLP	Intellectual Ventures Asia Pte. Ltd.	Assignment of Assignor's Interest
May 26, 2016 Reel 38726, frame 236	Intellectual Ventures Asia Pte. Ltd.	Empire Technology Development LLC	Assignment of Assignor's Interest
Jan 29, 2019 Reel 48373, frame 217	Empire Technology Development LLC	Crestline Direct Finance, L.p.	Security Interest
Mar 19, 2021 Reel 55650, frame 943	Crestline Direct Finance, L.p.	Empire Technology Development LLC	Release of Security Interest
Jun 30, 2021 Reel 56719, frame 48	Empire Technology Development, LLC	Xero Limited	Assignment of Assignor's Interest
Sep 22, 2025 Reel 72936, frame 464	Crestline Direct Finance, L.P., as Collateral Agent	Empire Technology Development LLC	Release of Security Interest in Patents, Recorded on January 29, 2019 at Reel 048373 Frame 0217
Jun 22, 2026 Reel 75799, frame 53	Crestline Direct Finance, L.P., as Collateral Agent	Empire Technology Development LLC	Release of Security Interest in Patents, Recorded on January 29, 2019, at Reel/Frame 048373/0217

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.

What's changing

Dec 2030

Term ends Dec 1, 2030. No further fees fall due before then

Note

The 456 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us

Citations

133

later US patents cite this one

That is top 5% 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.

In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.

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