Term ends Jan 8, 2035 · Medium confidence
20-year base term ends Mar 17, 2034
Why Medium: A parent in the chain could not be resolved.
Held by Littera Education Inc.
Filed Sep 28, 2018 as application 16/146,078 · Granted Jul 13, 2021
Base term plus 297 days of patent term adjustment (USPTO delay)
Today
2014
2035
Clock starts
Mar 17, 2014
Mar 17, 2014
Term ends
Jan 8, 2035
Jan 8, 2035
Granted
Jul 13, 2021
Jul 13, 2021
base term
patent term adjustment
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
297
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
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.
15
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 297 days past its 20-year base term on prosecution delay. 1 of 3 maintenance fees is 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 Mar 17, 2014, when application 14/216,688, the earliest non-provisional in its chain, was filed (this one was filed Sep 28, 2018); a parent in its chain could not be resolved (the next row) | Mar 17, 2034 | 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 | +297 days, USPTO patent term adjustment record | Jan 8, 2035 | 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 | In force | High confidence |
| Computed term end | The steps above, in order | Jan 8, 2035 | Medium confidence |
This family
| US 10,126,927 | In force Jun 2035 | Jun 2035 |
| US 10,540,906 | In force Sep 2034 | Sep 2034 |
| US 10,467,918 | In force Mar 2034 | Mar 2034 |
| US 11,113,983 | In force no later than Mar 2034 | no later than Mar 2034 |
| US 10,515,561 | In force Mar 2034 | Mar 2034 |
| US 10,572,135 | In force Mar 2034 | Mar 2034 |
| US 11,061,547 | this patent Jan 2035 | Jan 2035 |
| US 11,056,013 | In force Mar 2034 | Mar 2034 |
8 of 15 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 |
|---|---|---|---|
| Sep 28, 2018 Reel 47010, frame 158 | Fieldman, Ethan | Study Social, Inc. | Assignment of Assignor's Interest |
| Nov 23, 2021 Reel 58200, frame 782 | Study Edge, Inc. (F/K/A Study Social, Inc.) | Barings Finance LLC, as Collateral Agent | Security Interest |
| Aug 31, 2022 Reel 60957, frame 35 | Sunshine Merger Sub, Inc.; Studysocial, Inc. | Study Edge, Inc. | Merger |
| Aug 31, 2022 Reel 61361, frame 877 | Fieldman, Ethan | Studysocial, Inc. | Corrective Assignment to Correct the Receiving Party's Name from Study Social, Inc. to Studysocial, Inc. Previously Recorded on Reel 047010 Frame 0158. Assignor(S) Hereby Confirms the Assignment. |
| Sep 28, 2022 Reel 61247, frame 985 | Study Edge, Inc. | Littera Education Inc. | Assignment of Assignor's Interest |
| Sep 28, 2022 Reel 61248, frame 13 | Barings Finance LLC | Study Edge, Inc. | Release of Security Interest |
| Jan 5, 2024 Reel 66031, frame 962 | Littera Education Inc. | Kenmore Investor, LLC | Security Interest |
| Jun 12, 2025 Reel 71401, frame 65 | Kenmore Investor, LLC | Littera Education Inc. | Release of Security Interest |
| Jun 12, 2025 Reel 71402, frame 94 | Littera Education Inc. | Kenmore Littera Investor, LLC | Security Interest |
| Aug 4, 2025 Reel 71926, frame 606 | Kenmore Littera Investor, LLC | Littera Education 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.
What's changing
Jan 2035
Term ends Jan 8, 2035. Maintenance fees still fall due before then
Note
The 297 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
8
later US patents cite this one
That is top 25% of utility patents granted in 2021 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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.