Term ends Feb 13, 2029 · High confidence

Computed 20-year base term

Held by Dematic Corp.

Filed Sep 8, 2008 as application 12/206,011 · Granted Mar 22, 2011

Base term plus 158 days of patent term adjustment (USPTO delay)

Today

20 years from filing

Term ends Feb 13, 2029

2008 2029

Clock starts
Sep 8, 2008

Term ends
Feb 13, 2029

Granted
Mar 22, 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

158

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.

This patent's term runs 158 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 8, 2008, when this application, 12/206,011, was filed	Sep 8, 2028	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	+158 days, USPTO patent term adjustment record	Feb 13, 2029	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	Feb 13, 2029	High confidence

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
Sep 29, 2008 Reel 21598, frame 9	Lupton, Clinton R.; Kane, Kenneth D.; Butler, Phillip C.; Dewildt, Charles J.	Dematic Corp.	Assignment of Assignor's Interest
Jun 2, 2011 Reel 26376, frame 594	Dematic Corp.	J.P. Morgan Europe Limited, as Security Agent	Security Agreement
Jan 2, 2013 Reel 29556, frame 364	Dematic Corp.	Credit Suisse AG, Cayman Islands Branch, as Collateral Agent	Security Agreement
Jan 3, 2013 Reel 29558, frame 985	J.P. Morgan Europe Limited, as Security Agent	Dematic Corp.	Release of Security Interest
Nov 1, 2016 Reel 40543, frame 5	Credit Suisse AG, Cayman Islands Branch, as Collateral Agent	Dematic Corp.	Release of 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

Feb 2029

Term ends Feb 13, 2029. No further fees fall due before then

Note

The 158 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us

Citations

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.

Conveyor Systems