Lapsed Aug 1, 2025 on the fee record · High confidence
20-year base term ends May 11, 2032
Second maintenance fee unpaid; grace period ended.
Held by Memjet Technology Limited
Filed Jan 26, 2015 as application 14/605,845 · Granted Aug 1, 2017
Base term, 20 years from filing
Today
Lapsed Aug 1, 2025
2012
2032
Clock starts
May 11, 2012
May 11, 2012
No longer in force
Aug 1, 2025
Aug 1, 2025
Granted
Aug 1, 2017
Aug 1, 2017
Term would have run to
May 11, 2032
May 11, 2032
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.
None
Terminal disclaimer
No disclaimer on this record.
1 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.
3
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 11, 2032: its 20-year base term, with no 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 May 11, 2012, when application 13/469,089, the earliest non-provisional in its chain, was filed (this one was filed Jan 26, 2015) | May 11, 2032 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | 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 | 1 of 3 maintenance fees paid | lapsed Aug 1, 2025 | High confidence |
| Computed term end | The steps above, in order | Aug 1, 2025 | High confidence |
This family
| US 8,757,779 | In force Jul 2032 | Jul 2032 |
| US 8,939,544 | In force May 2032 | May 2032 |
| US 9,718,979 | this patent Aug 2025 | Aug 2025 |
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 |
|---|---|---|---|
| Aug 19, 2015 Reel 36361, frame 423 | Gimona, Michele; Channarayapatna, Lakshmi; Fielder, Simon; Digweed, Katja Johanna | Silverbrook Research Pty. Limited | Assignment of Assignor's Interest |
| Aug 24, 2015 Reel 36435, frame 28 | Silver Brook Research Pty. Limited | Zamtec Limited | Assignment of Assignor's Interest |
| Aug 24, 2015 Reel 36435, frame 251 | 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.
Citations
0
later US patents cite this one
That is below the median of utility patents granted in 2017 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.