Collateral for a security interest recorded Feb 14, 2023 (Bank of America, N.A.).
Lapsed Jan 21, 2024 on the fee record · High confidence
20-year base term ends Mar 4, 2035
First maintenance fee unpaid; grace period ended.
Held by RingCentral, Inc.
Filed Jan 12, 2018 as application 15/869,387 · Granted Jan 21, 2020
Base term, 20 years from filing, plus 24 days of patent term adjustment (USPTO delay)
Today
Lapsed Jan 21, 2024
2015
2035
Clock starts
Mar 4, 2015
Mar 4, 2015
No longer in force
Jan 21, 2024
Jan 21, 2024
Granted
Jan 21, 2020
Jan 21, 2020
Term would have run to
Mar 28, 2035
Mar 28, 2035
base term
patent term adjustment
after the term ends
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
24
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
0 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 Mar 28, 2035: its 20-year base term plus 24 days of term 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 Mar 4, 2015, when application 14/637,449, the earliest non-provisional in its chain, was filed (this one was filed Jan 12, 2018) | Mar 4, 2035 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +24 days, USPTO patent term adjustment record | Mar 28, 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 | 0 of 3 maintenance fees paid | lapsed Jan 21, 2024 | High confidence |
| Computed term end | The steps above, in order | Jan 21, 2024 | High confidence |
This family
| Application 14/637,449 | Abandoned not computed | not computed |
| US 10,542,056 | this patent Jan 2024 | Jan 2024 |
| US 11,558,437 | In force no later than Nov 2036 | no later than Nov 2036 |
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 |
|---|---|---|---|
| Jan 31, 2018 Reel 44787, frame 522 | Ruetschi, Johannes; Domingos, Luiz; Garbin, Christian | Unify GmbH & Co. KG | Assignment of Assignor's Interest |
| Aug 5, 2020 Reel 53404, frame 618 | Unify Software and Solutions GmbH & Co. KG; Unify Patente GmbH & Co. KG | RingCentral IP Holdings, Inc. | Assignment of Assignor's Interest |
| Aug 5, 2020 Reel 53404, frame 668 | RingCentral IP Holdings, Inc. | RingCentral, Inc. | Assignment of Assignor's Interest |
| Dec 21, 2020 Reel 54822, frame 1 | Unify GmbH & Co. KG | Unify Patente GmbH & Co. KG | Confidential Patent Agreement |
| Jan 28, 2021 Reel 55058, frame 538 | Lederer, Thomas | Unify GmbH & Co. KG | Assignment of Assignor's Interest |
| Feb 1, 2022 Reel 58852, frame 399 | RingCentral IP Holdings, Inc. | RingCentral, Inc. | Assignment of Assignor's Interest |
| Feb 14, 2023 Reel 62973, frame 194 | RingCentral, Inc. | Bank of America, N.A., as Collateral Agent | 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 24 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
21
later US patents cite this one
That is top 10% of utility patents granted in 2020 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.