Term ends Sep 29, 2029 · High confidence
20-year base term ended Dec 15, 2025
Held by Open Text S.A. ULC
Filed Dec 15, 2005 as application 11/305,543 · Granted Apr 23, 2013
Base term plus 1384 days of patent term adjustment (USPTO delay)
Today
2005
2029
Clock starts
Dec 15, 2005
Dec 15, 2005
Term ends
Sep 29, 2029
Sep 29, 2029
Granted
Apr 23, 2013
Apr 23, 2013
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
1,384
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.
This patent's term runs 1384 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 Dec 15, 2005, when this application, 11/305,543, was filed | Dec 15, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1384 days, USPTO patent term adjustment record | Sep 29, 2029 | 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 | Sep 29, 2029 | High confidence |
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 |
|---|---|---|---|
| Feb 28, 2006 Reel 17224, frame 375 | Sell, Jorg-stefan | Ixos Software AG | Assignment of Assignor's Interest |
| Jan 29, 2010 Reel 23876, frame 53 | Ixos Software AG | Open Text Software GmbH | Merger |
| Nov 11, 2011 Reel 27282, frame 41 | Ixos Software AG | Open Text Software GmbH | Merger |
| Jan 30, 2015 Reel 34856, frame 285 | Open Text Software GmbH | Open Text S.A. | Assignment of Assignor's Interest |
| Nov 7, 2016 Reel 40573, frame 244 | Open Text S.A. | OT IP Sub, LLC | IP Business Sale Agreement |
| Nov 7, 2016 Reel 40575, frame 324 | OT IP Sub, LLC | IP OT Sub ULC | Certificate of Continuance |
| Nov 7, 2016 Reel 40575, frame 327 | IP OT Sub ULC | Open Text S.A. ULC | Certificate of Amalgamation |
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
Sep 2029
Term ends Sep 29, 2029. No further fees fall due before then
Note
The 1384 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
84
later US patents cite this one
That is top 10% of utility patents granted in 2013 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.