Term ends Nov 6, 2028 · High confidence
20-year base term ended Mar 29, 2026
Held by WestRock Shared Services, LLC
Filed Mar 29, 2006 as application 11/392,128 · Granted Dec 28, 2010
Base term plus 953 days of patent term adjustment (USPTO delay)
Today
2006
2028
Clock starts
Mar 29, 2006
Mar 29, 2006
Term ends
Nov 6, 2028
Nov 6, 2028
Granted
Dec 28, 2010
Dec 28, 2010
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
953
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.
84
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 953 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 Mar 29, 2006, when this application, 11/392,128, was filed | Mar 29, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +953 days, USPTO patent term adjustment record | Nov 6, 2028 | 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 | Nov 6, 2028 | High confidence |
This family
| US 6,585,153 | Term ended Apr 2020 | Apr 2020 |
| Application 09/804,290 | Abandoned not computed | not computed |
| US 6,752,350 | Lapsed on the fee record Jun 2016 | Jun 2016 |
| US 6,644,541 | Lapsed on the fee record Nov 2007 | Nov 2007 |
| US 6,530,516 | Term ended Nov 2021 | Nov 2021 |
| US 6,443,329 | Term ended Jan 2022 | Jan 2022 |
| US 7,124,890 | Lapsed on the fee record Oct 2014 | Oct 2014 |
| US 6,715,623 | Term ended Feb 2022 | Feb 2022 |
8 of 84 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 |
|---|---|---|---|
| Mar 29, 2006 Reel 17701, frame 499 | Barner, James W. | Smurfit-Stone Container Enterprises, Inc. | Assignment of Assignor's Interest |
| Jul 7, 2010 Reel 24640, frame 501 | Smurfit-Stone Container Corporation (F/K/A Smurfit Stone Container Enterprises, Inc.) | JPMorgan Chase Bank, N.A., as Administrative Agent | Security Agreement |
| Jul 12, 2010 Reel 24662, frame 368 | Smurfit-Stone Container Corporation (Formerly Known as Smurfit-Stone Container Enterprises, Inc.) | Deutsche Bank AG New York Branch, as Security Agent | Security Agreement |
| Jun 9, 2011 Reel 26414, frame 273 | Deutsche Bank AG New York Branch, as Security Agent | Smurfit Stone Container Corporation | Release of Security Interest |
| Jun 9, 2011 Reel 26415, frame 130 | JPMorgan Chase Bank, N.A., as Administrative Agent | Smurfit Stone Container Corporation | Release of Security Interest |
| Aug 23, 2013 Reel 31074, frame 590 | Smurfit-Stone Container Enterprises, Inc. | Smurfit-Stone Container Corporation | Merger |
| Aug 30, 2013 Reel 31122, frame 131 | Smurfit-Stone Container Corporation | Rocktenn CP, LLC | Merger |
| Sep 20, 2013 Reel 31247, frame 991 | Rocktenn CP, LLC | Rock-Tenn Shared Services, LLC | Assignment of Assignor's Interest |
| Nov 6, 2015 Reel 37057, frame 404 | Rock-Tenn Shared Services, LLC | WestRock Shared Services, LLC | Change of Name |
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
Nov 2028
Term ends Nov 6, 2028. No further fees fall due before then
Note
The 953 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
109
later US patents cite this one
That is top 10% of utility patents granted in 2010 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.