Term ends no later than Aug 15, 2033 · Medium confidence
20-year base term ends Aug 15, 2033
In force on USPTO's status record and by its fee record. A terminal disclaimer on file may shorten this term, possibly to a date already past; its reference document is unresolved, so the date above is an upper bound and no earlier date is guessed.
Held by Ipierian, Inc.
Filed Feb 11, 2015 as application 14/421,073 · Granted Feb 14, 2017
Base term, 20 years from filing
Today
2013
2033
Clock starts
Aug 15, 2013
Aug 15, 2013
Ends no later than
Aug 15, 2033
Aug 15, 2033
Granted
Feb 14, 2017
Feb 14, 2017
base term
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.
2 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.
9
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. 2 of 3 maintenance fees are paid so far. 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 Aug 15, 2013, when application PCT/US2013/055203, the earliest non-provisional in its chain, was filed (this one was filed Feb 11, 2015) | Aug 15, 2033 | 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 | 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 | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | no later than Aug 15, 2033 | Medium confidence |
This family
| Application PCT/US2013/055203 | PCT application no patent term | no patent term |
| US 8,926,974 | In force Aug 2033 | Aug 2033 |
| Application 14/104,717 | Abandoned not computed | not computed |
| Application 14/104,706 | Abandoned not computed | not computed |
| Application PCT/US2014/041553 | PCT application no patent term | no patent term |
| US 9,567,395 | this patent no later than Aug 2033 | no later than Aug 2033 |
| Application 14/896,611 | Abandoned not computed | not computed |
| US 10,040,847 | In force Aug 2033 | Aug 2033 |
8 of 9 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 |
|---|---|---|---|
| Apr 1, 2015 Reel 35312, frame 802 | Griswold-prenner, Irene; Nancy, Stagliano E.; Dang, Vu Cao | Ipierian, Inc. | Assignment of Assignor's Interest |
| Apr 3, 2015 Reel 35365, frame 606 | Griswold-prenner, Irene; Stagliano, Nancy E.; Dang, Vu Cao | Ipierian, Inc. | Corrective Assignment to Correct the Second Inventor's Name Previously Recorded at Reel: 035312 Frame: 0802. Assignor(S) Hereby Confirms the Assignment. |
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
Aug 2033
Term ends no later than Aug 15, 2033. Maintenance fees still fall due before then
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 Aug 15, 2033. We will not guess the cap.
Citations
22
later US patents cite this one
That is top 25% 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
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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.