Term ends no later than Feb 17, 2027 · Medium confidence
20-year base term ended Jul 25, 2026
In force on USPTO's status record and by its fee record. A terminal disclaimer on file may shorten this term, possibly to a date already past; its reference document is unresolved, so the date above is an upper bound and no earlier date is guessed.
Filed Jun 3, 2008 as application 12/132,597 · Granted Feb 1, 2011
Base term plus 207 days of patent term adjustment (USPTO delay)
Today
2006
2027
Clock starts
Jul 25, 2006
Jul 25, 2006
Ends no later than
Feb 17, 2027
Feb 17, 2027
Granted
Feb 1, 2011
Feb 1, 2011
base term
patent term adjustment
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
207
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
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.
17
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 207 days past its 20-year base term on prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. All three maintenance fees are recorded paid; no more fees are due. 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 Jul 25, 2006, when application PCT/CA2006/001225, the earliest non-provisional in its chain, was filed (this one was filed Jun 3, 2008) | Jul 25, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +207 days, USPTO patent term adjustment record | Feb 17, 2027 | High confidence |
| Terminal disclaimer cap | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium 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 | no later than Feb 17, 2027 | Medium confidence |
This family
| US 7,906,770 | In force Nov 2027 | Nov 2027 |
| US 7,880,154 | this patent no later than Feb 2027 | no later than Feb 2027 |
| US 8,696,538 | In force Feb 2027 | Feb 2027 |
| US 9,050,459 | Term ended Jul 2026 | Jul 2026 |
| US 9,630,025 | Term ended Oct 2026 | Oct 2026 |
| US 9,687,677 | Term ended Jul 2026 | Jul 2026 |
| US 9,687,673 | Term ended Jul 2026 | Jul 2026 |
| US 9,687,678 | Term ended Jul 2026 | Jul 2026 |
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 |
|---|---|---|---|
| Sep 30, 2015 Reel 36696, frame 54 | Otto, Karl | Varian Medical Systems International AG | Assignment of Assignor's Interest |
| Jan 17, 2024 Reel 66342, frame 1 | Varian Medical Systems, Inc. | Siemens Healthineers International AG | Change of Name |
| Jan 24, 2024 Reel 66368, frame 448 | Varian Medical Systems International AG | Siemens Healthineers International AG | 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
Feb 2027
Term ends no later than Feb 17, 2027. No further fees fall due before then
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Note
The 207 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Feb 17, 2027. We will not guess the cap.
Citations
121
later US patents cite this one
That is top 5% 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
This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. 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.