Collateral for a security interest recorded Dec 12, 2024 (Wilmington Trust, National Association).

Term ends Jan 1, 2027 · High confidence

Computed 20-year base term

Held by Dropbox, Inc.

Filed Jun 13, 2008 as application 12/157,772 · Granted Feb 8, 2011

Base term plus 419 days of patent term adjustment (USPTO delay)

Today

20 years from filing

Term ends Jan 1, 2027

2005 2027

Clock starts
Nov 8, 2005

Term ends
Jan 1, 2027

Granted
Feb 8, 2011

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

419

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 419 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 Nov 8, 2005, when application 11/269,498, the earliest non-provisional in its chain, was filed (this one was filed Jun 13, 2008)	Nov 8, 2025	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+419 days, USPTO patent term adjustment record	Jan 1, 2027	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	Jan 1, 2027	High confidence

This family

Application 11/269,498	Abandoned not computed	not computed
US 7,885,925	this patent Jan 2027	Jan 2027
US 8,370,298	Term ended Nov 2025	Nov 2025
US 8,600,934	Term ended no later than Nov 2025	no later than Nov 2025
US 9,037,540	Term ended Nov 2025	Nov 2025
US 10,158,708	Term ended Nov 2025	Nov 2025
US 11,334,555	In force May 2028	May 2028
US 11,341,114	In force Feb 2028	Feb 2028

8 of 17 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
Dec 1, 2008 Reel 21917, frame 927	Strong, Jack Benjamin; Thomas, Gibu	Sharpcast, Inc.	Assignment of Assignor's Interest
Mar 5, 2009 Reel 22376, frame 835	Sharpcast, Inc.	Venture Lending & Leasing IV, Inc.; Venture Lending & Leasing V, Inc.	Security Agreement
Mar 5, 2009 reel/frame not recorded	Sharpcast, Inc.	Venture Lending & Leasing IV, Inc.	Security Agreement
Mar 5, 2009 reel/frame not recorded	Sharpcast, Inc.	Venture Lending & Leasing V, Inc.	Security Agreement
Dec 23, 2010 Reel 25562, frame 397	Sharpcast, Inc.	Sugarsync, Inc.	Change of Name
Nov 13, 2013 Reel 31593, frame 861	Venture Lending & Leasing IV, Inc. and Venture Lending & Leasing V, Inc.	Sugarsync, Inc.	Release of Security Interest
Nov 19, 2013 Reel 31674, frame 1	Sugarsync, Inc.	Fifth Street Finance Corp.	Security Agreement
Oct 17, 2014 Reel 33969, frame 891	Fifth Street Finance Corp.	Sugarsync, Inc.	Release of Security Interest
Nov 11, 2014 Reel 34144, frame 861	Sugarsync, Inc.	Dropbox, Inc.	Assignment of Assignor's Interest
Apr 14, 2017 Reel 42254, frame 1	Dropbox, Inc.	JPMorgan Chase Bank, N.A., as Collateral Agent	Security Interest
Mar 10, 2021 Reel 55670, frame 219	Dropbox, Inc.	JPMorgan Chase Bank, N.A., as Collateral Agent	Patent Security Agreement
Dec 12, 2024 Reel 69604, frame 611	Dropbox, Inc.	Wilmington Trust, National Association, as Collateral Agent	Security Interest
Dec 12, 2024 Reel 69613, frame 744	JPMorgan Chase Bank, N.A., as Collateral Agent	Dropbox, Inc.	Release of Security Interest
Dec 13, 2024 Reel 69635, frame 332	JPMorgan Chase Bank, N.A., as Collateral Agent	Dropbox, Inc.	Release of Security Interest
Jun 5, 2026 Reel 76607, frame 1	Dropbox, Inc.	Jpmorgan Chase Bank, N.a.	Security 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.

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

What's changing

Jan 2027

Term ends Jan 1, 2027. No further fees fall due before then

Note

The 419 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us

Citations

103

later US patents cite this one

That is top 10% of utility patents granted in 2011 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.

Method and Apparatus for a File Sharing and Synchronization System