Term ends Dec 1, 2028 · High confidence
20-year base term ends Dec 1, 2028
Held by International Paper Company
Filed Sep 15, 2011 as application 13/234,001 · Granted Aug 28, 2012
Base term, 20 years from filing
Today
2008
2028
Clock starts
Dec 1, 2008
Dec 1, 2008
Term ends
Dec 1, 2028
Dec 1, 2028
Granted
Aug 28, 2012
Aug 28, 2012
base term
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
None
Term adjustment
No prosecution delay on this record.
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.
2
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 is its 20-year base term, with no adjustment for 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 Dec 1, 2008, when application 12/326,045, the earliest non-provisional in its chain, was filed (this one was filed Sep 15, 2011) | Dec 1, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | 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, 2028 | High confidence |
This family
| US 8,091,770 | In force no later than Jun 2029 | no later than Jun 2029 |
| US 8,251,276 | this patent Dec 2028 | Dec 2028 |
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 |
|---|---|---|---|
| Jun 28, 2012 Reel 28461, frame 286 | McLeod, Michael B. | Tin Inc. | Assignment of Assignor's Interest |
| Jan 17, 2017 Reel 41382, frame 48 | Tin Inc. | Tin LLC | Change of Name |
| Nov 6, 2018 Reel 47418, frame 538 | Tin LLC | International Paper Company | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Dec 2028
Term ends Dec 1, 2028. No further fees fall due before then
Citations
28
later US patents cite this one
That is top 25% of utility patents granted in 2012 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.