Collateral for a security interest recorded Jul 3, 2025 (Deutsche Bank AG New York Branch).
Term ends no later than Apr 8, 2028 · Medium confidence
20-year base term ended Jul 6, 2024
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.
Held by IGT
Filed Jan 6, 2006 as application 11/327,215 · Granted Dec 7, 2010
Base term plus 1372 days of patent term adjustment (USPTO delay)
Today
2004
2028
Clock starts
Jul 6, 2004
Jul 6, 2004
Ends no later than
Apr 8, 2028
Apr 8, 2028
Granted
Dec 7, 2010
Dec 7, 2010
base term
patent term adjustment
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
1,372
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.
18
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 1372 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 6, 2004, when application 10/885,570, the earliest non-provisional in its chain, was filed (this one was filed Jan 6, 2006) | Jul 6, 2024 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1372 days, USPTO patent term adjustment record | Apr 8, 2028 | 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 Apr 8, 2028 | Medium confidence |
This family
| US 8,043,152 | In force Dec 2026 | Dec 2026 |
| US 7,846,017 | this patent no later than Apr 2028 | no later than Apr 2028 |
| US 8,366,531 | In force no later than Mar 2028 | no later than Mar 2028 |
| US 9,171,421 | In force Oct 2030 | Oct 2030 |
| US 7,824,258 | In force no later than Oct 2027 | no later than Oct 2027 |
| US 8,038,520 | In force Jun 2027 | Jun 2027 |
| US 7,806,761 | In force no later than Aug 2027 | no later than Aug 2027 |
| US 8,038,523 | In force no later than Sep 2027 | no later than Sep 2027 |
8 of 18 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 |
|---|---|---|---|
| Mar 20, 2006 Reel 17695, frame 142 | Walker, Jay S.; Tedesco, Robert C.; Jorasch, James A.; Suarez, Jose A. | Walker Digital, LLC | Assignment of Assignor's Interest |
| Nov 4, 2009 Reel 23456, frame 940 | Walker Digital, LLC | IGT | Assignment of Assignor's Interest |
| Jul 3, 2025 Reel 71817, frame 394 | IGT | Deutsche Bank AG New York Branch, as Collateral Agent | Security Agreement |
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
Apr 2028
Term ends no later than Apr 8, 2028. 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 1372 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 Apr 8, 2028. We will not guess the cap.
Citations
217
later US patents cite this one
That is top 5% of utility patents granted in 2010 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.