Term ended May 6, 2026 · High confidence
20-year base term ended Dec 5, 2025
Held by Memjet Technology Limited
Filed Jun 25, 2008 as application 12/146,415 · Granted Aug 17, 2010
Base term plus 152 days of patent term adjustment (USPTO delay)
Today
Term ended May 6, 2026
2005
2026
Clock starts
Dec 5, 2005
Dec 5, 2005
Term ended
May 6, 2026
May 6, 2026
Granted
Aug 17, 2010
Aug 17, 2010
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
152
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 12,146,415, to May 6, 2026. The term already ends on or before that date, so the cap shortened nothing.
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.
4
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 152 days past its 20-year base term on prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 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 Dec 5, 2005, when application 11/293,840, the earliest non-provisional in its chain, was filed (this one was filed Jun 25, 2008) | Dec 5, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +152 days, USPTO patent term adjustment record | May 6, 2026 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 12,146,415) | resolves to May 6, 2026, no earlier than this term, so no change | 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 | May 6, 2026 | High confidence |
This family
| US 7,452,055 | In force no later than Jan 2027 | no later than Jan 2027 |
| US 7,775,643 | this patent May 2026 | May 2026 |
| US 7,780,262 | Lapsed on the fee record Aug 2018 | Aug 2018 |
| US 7,824,026 | Lapsed on the fee record Nov 2022 | Nov 2022 |
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 |
|---|---|---|---|
| Jun 25, 2008 Reel 21152, frame 319 | Hibbard, Christopher; Silverbrook, Kia; Nakazawa, Akira; Jackson, Gary Raymond; Morgan, John Douglas Peter | Silverbrook Research Pty Ltd. | Assignment of Assignor's Interest |
| Jul 9, 2012 Reel 28514, frame 775 | Silverbrook Research Pty. Limited and Clamate Pty Limited | Zamtec Limited | Assignment of Assignor's Interest |
| Jun 25, 2014 Reel 33244, frame 276 | Zamtec Limited | Memjet Technology Limited | 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.
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Alerts on its grants, lapses and transfers.
What's changing
Note
The 152 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 12,146,415, ends no earlier than this term, so it caps nothing.
Citations
0
later US patents cite this one
That is below the median 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
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.