Term ended Jun 8, 2026 · High confidence
20-year base term ended May 16, 2022
Held by Brainlab SE
Filed May 16, 2002 as application 10/150,877 · Granted Sep 8, 2009
Base term plus 1484 days of patent term adjustment (USPTO delay)
Today
Term ended Jun 8, 2026
2002
2026
Clock starts
May 16, 2002
May 16, 2002
Term ended
Jun 8, 2026
Jun 8, 2026
Granted
Sep 8, 2009
Sep 8, 2009
base term
patent term adjustment
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
1,484
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.
5
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 1484 days past its 20-year base term on prosecution delay. All three maintenance fees were paid, so no fee lapse ended it. 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 May 16, 2002, when this application, 10/150,877, was filed | May 16, 2022 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1484 days, USPTO patent term adjustment record | Jun 8, 2026 | 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 | term ended | High confidence |
| Computed term end | The steps above, in order | Jun 8, 2026 | High confidence |
This family
| US 7,744,605 | In force May 2028 | May 2028 |
| US 7,587,235 | this patent Jun 2026 | Jun 2026 |
| US 7,993,353 | In force Aug 2028 | Aug 2028 |
| US 8,328,793 | Term ended Jul 2026 | Jul 2026 |
| US D854,165 | In force Jul 2034 | Jul 2034 |
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 |
|---|---|---|---|
| Aug 12, 2002 reel/frame not recorded | Ritter, Alf; Zeiss, Mario; Wist, Henrik; Kreuzer, Klaus-peter; Lang, Helmar Werner; Rotermund-brown, Hanna; Strobel, Jorg Peter | Brainlab AG | Assignment of Assignor's Interest |
| Aug 12, 2002 reel/frame not recorded | Ritter, Alf; Zeiss, Mario; Wist, Henrik; Kreuzer, Klaus-peter; Lang, Helmar Werner; Rotermund-brown, Hanna; Strobel, Jorg Peter | Instrumentarium Imaging Ziehm GmbH | Assignment of Assignor's Interest |
| Aug 12, 2002 Reel 13187, frame 668 | Wist, Henrik; Ritter, Alf; Zeiss, Mario; Rotermund-brown, Hanna; Lang, Helmar Werner; Strobel, Jorg Peter; Kreuzer, Klaus-peter | Brainlab AG; Instrumentarium Imaging Ziehm GmbH | Assignment of Assignor's Interest |
| Feb 24, 2026 Reel 73877, frame 190 | Brainlab AG | Brainlab SE | 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
Note
The 1484 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
87
later US patents cite this one
That is top 10% of utility patents granted in 2009 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.