Term ended no later than Jul 10, 2018 · Low confidence
20-year base term ended Jul 10, 2018
Held by Memjet Technology Limited
Filed May 14, 2001 as application 09/855,093 · Granted Jan 14, 2003
Base term, 20 years from filing
Today
Ended no later than Jul 10, 2018
1998
2026
Clock starts
Jul 10, 1998
Jul 10, 1998
Ended no later than
Jul 10, 2018
Jul 10, 2018
Granted
Jan 14, 2003
Jan 14, 2003
base term
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
None
Term adjustment
No prosecution delay on this record.
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.
1,425
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 is its 20-year base term, with no adjustment for 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 were paid, so no fee lapse ended it. Confidence: Low. 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 10, 1998, when application 09/112,806, the earliest non-provisional in its chain, was filed (this one was filed May 14, 2001); a parent in its chain could not be resolved (the next row) | Jul 10, 2018 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | None on file | no change | 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 | term ended | High confidence |
| Computed term end | The steps above, in order | no later than Jul 10, 2018 | Low confidence |
This family
| US 6,464,340 | Term ended Aug 2018 | Aug 2018 |
| US 6,918,655 | Lapsed on the fee record Jul 2017 | Jul 2017 |
| US 6,938,989 | Lapsed on the fee record Sep 2013 | Sep 2013 |
| US 6,742,873 | Lapsed on the fee record Jun 2016 | Jun 2016 |
| US 6,923,526 | Lapsed on the fee record Aug 2017 | Aug 2017 |
| US 6,588,882 | Lapsed on the fee record Jul 2015 | Jul 2015 |
| US 6,505,912 | this patent no later than Jul 2018 | no later than Jul 2018 |
| US 6,485,123 | Lapsed on the fee record Nov 2014 | Nov 2014 |
8 of 1425 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 |
|---|---|---|---|
| May 14, 2001 Reel 11817, frame 582 | Silverbrook, Kia; McAvoy, Greg | Silverbrook Research Pty. Ltd. | Assignment of Assignor's Interest |
| Jul 12, 2012 Reel 28537, frame 909 | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Jul 10, 2018. We will not guess the cap.
Citations
41
later US patents cite this one
That is top 25% of utility patents granted in 2003 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.