Term ended Jul 18, 2023 · Medium confidence
20-year base term ended Oct 28, 2018
Why Medium: A parent in the chain could not be resolved.
USPTO later recorded it as expired for non-payment on Jun 23, 2025.
Held by Tsunami Medtech, LLC
Filed Jan 10, 2006 as application 11/329,381 · Granted May 21, 2013
Base term plus 1724 days of patent term adjustment (USPTO delay)
Today
Term ended Jul 18, 2023
1998
2026
Clock starts
Oct 28, 1998
Oct 28, 1998
Term ended
Jul 18, 2023
Jul 18, 2023
Granted
May 21, 2013
May 21, 2013
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
1,724
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
2 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
40
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 1724 days past its 20-year base term on prosecution delay. 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 Oct 28, 1998, when the earliest non-provisional application in its chain was filed (this one was filed Jan 10, 2006); a parent in its chain could not be resolved (the next row) | Oct 28, 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 | +1724 days, USPTO patent term adjustment record | Jul 18, 2023 | 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 | 2 of 2 maintenance fees paid | term ended | High confidence |
| USPTO status record | Recorded as expired for non-payment on Jun 23, 2025, after the term ended | no change | High confidence |
| Computed term end | The steps above, in order | Jul 18, 2023 | Medium confidence |
This family
| US 6,508,816 | Term ended Aug 2018 | Aug 2018 |
| US 6,669,694 | Term ended Dec 2021 | Dec 2021 |
| US 6,911,028 | Term ended Aug 2018 | Aug 2018 |
| US 7,674,259 | Term ended no later than Dec 2022 | no later than Dec 2022 |
| US 7,549,987 | Lapsed on the fee record Jun 2021 | Jun 2021 |
| US 7,892,229 | Term ended Aug 2022 | Aug 2022 |
| US 8,016,823 | Term ended May 2022 | May 2022 |
| US 8,444,636 | this patent Jul 2023 | Jul 2023 |
8 of 40 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 27, 2009 Reel 22460, frame 22 | Shadduck, John H. | Tsunami Medtech, LLC | Assignment of Assignor's Interest |
| Mar 27, 2009 Reel 22461, frame 429 | Hoey, Michael | Tsunami Medtech, LLC | Assignment of Assignor's Interest |
| Oct 13, 2017 Reel 44261, frame 696 | Aegea Medical Inc. | Oxford Finance LLC, as Collateral Agent and as a Lender | Security Interest |
| Mar 1, 2018 Reel 45482, frame 1 | Oxford Finance LLC, as Collateral Agent | Aegea Medical Inc. | Release of Security 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 1724 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
409
later US patents cite this one
That is top 1% of utility patents granted in 2013 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.