Term ended Mar 22, 2026 · Medium confidence
20-year base term ended Mar 22, 2026
Why Medium: The disclaimer's references carry disclaimers of their own not yet read (US 7,666,258, US 7,744,692), so the cap could be lower.
Held by Syntheon Holdings S.p.A.
Filed Nov 4, 2009 as application 12/612,097 · Granted Oct 4, 2011
Base term, 20 years from filing
Today
Term ended Mar 22, 2026
2006
2026
Clock starts
Mar 22, 2006
Mar 22, 2006
Term ended
Mar 22, 2026
Mar 22, 2026
Granted
Oct 4, 2011
Oct 4, 2011
base term
after the term ends
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.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 7,666,258, US 7,744,692, to Mar 22, 2026. The term already ends on or before that date, so the cap shortened nothing.
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.
10
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. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. All three maintenance fees were paid, so no fee lapse ended it. Confidence: Medium. 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 22, 2006, when application 11/387,198, the earliest non-provisional in its chain, was filed (this one was filed Nov 4, 2009) | Mar 22, 2026 | 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 | Disclaimer resolved from the filed document (refs US 7,666,258, US 7,744,692) | resolves to Mar 22, 2026, no earlier than this term, so no change | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 3 of 3 maintenance fees paid | term ended | High confidence |
| Computed term end | The steps above, in order | Mar 22, 2026 | Medium confidence |
This family
| US 7,644,548 | In force no later than Dec 2027 | no later than Dec 2027 |
| US 7,632,348 | Lapsed on the fee record Dec 2017 | Dec 2017 |
| US 7,658,797 | In force no later than Oct 2027 | no later than Oct 2027 |
| US 7,648,574 | Term ended Mar 2026 | Mar 2026 |
| US 7,699,929 | Surrendered on reissue no later than Mar 2012 | no later than Mar 2012 |
| US 8,029,617 | this patent Mar 2026 | Mar 2026 |
| US 7,820,094 | Lapsed on the fee record Oct 2022 | Oct 2022 |
| US 8,357,240 | Term ended Mar 2026 | Mar 2026 |
8 of 10 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 |
|---|---|---|---|
| Oct 31, 2012 Reel 29218, frame 1 | Nova Chemicals Inc. | Syntheon Inc. | Assignment of Assignor's Interest |
| Feb 28, 2019 Reel 49896, frame 538 | Syntheon Inc. | Syntheon Holdings S.p.A. | 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.
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 7,666,258, US 7,744,692, ends no earlier than this term, so it caps nothing.
Citations
54
later US patents cite this one
That is top 25% 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.