Lapsed Jul 28, 2013 on the fee record · High confidence
20-year base term ended Aug 1, 2025
First maintenance fee unpaid; grace period ended.
Held by Silverbrook Research Pty Ltd.
Filed Aug 1, 2005 as application 11/193,435 · Granted Jul 28, 2009
Base term, 20 years from filing, plus 651 days of patent term adjustment (USPTO delay)
Today
Lapsed Jul 28, 2013
2005
2027
Clock starts
Aug 1, 2005
Aug 1, 2005
No longer in force
Jul 28, 2013
Jul 28, 2013
Granted
Jul 28, 2009
Jul 28, 2009
Term would have run to
May 14, 2027
May 14, 2027
base term
patent term adjustment
after the term ends
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
651
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
0 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.
4
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to May 14, 2027: its 20-year base term plus 651 days of term adjustment for prosecution delay. 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 Aug 1, 2005, when this application, 11/193,435, was filed | Aug 1, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +651 days, USPTO patent term adjustment record | May 14, 2027 | 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 | 0 of 3 maintenance fees paid | lapsed Jul 28, 2013 | High confidence |
| Computed term end | The steps above, in order | Jul 28, 2013 | High confidence |
This family
| US 7,567,241 | this patent Jul 2013 | Jul 2013 |
| US 7,794,167 | In force Jul 2028 | Jul 2028 |
| US 8,308,387 | Lapsed on the fee record Nov 2016 | Nov 2016 |
| US 7,955,017 | Lapsed on the fee record Jun 2015 | Jun 2015 |
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 |
|---|---|---|---|
| Jan 11, 2006 Reel 17177, frame 836 | King, Tobin Allen; Silverbrook, Kia | Silverbrook Research Pty Ltd. | 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.
What's changing
Note
The 651 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
10
later US patents cite this one
That is below the median 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.