Term ended Apr 17, 2021 · High confidence
20-year base term ended Apr 17, 2021
USPTO later recorded it as expired for non-payment on Jan 13, 2025.
Held by Rampart Asset Management, LLC
Filed Oct 31, 2018 as application 16/177,199 · Granted Dec 8, 2020
Base term plus 64 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
Term ended Apr 17, 2021
2001
2026
Clock starts
Apr 17, 2001
Apr 17, 2001
Term ended
Apr 17, 2021
Apr 17, 2021
Granted
Dec 8, 2020
Dec 8, 2020
base term
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
64
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 9,417,800.
None due
Maintenance fees
This term ends before the first maintenance fee's grace period does, 4 years from grant, so no fee can end it early.
7
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 64 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 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 Apr 17, 2001, when application 09/837,307, the earliest non-provisional in its chain, was filed (this one was filed Oct 31, 2018) | Apr 17, 2021 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +64 days, USPTO patent term adjustment record | Jun 20, 2021 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 9,417,800) | capped to Apr 17, 2021 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | No maintenance fee can end the term early | term ended | High confidence |
| USPTO status record | Recorded as expired for non-payment on Jan 13, 2025, after the term ended | no change | High confidence |
| Computed term end | The steps above, in order | Apr 17, 2021 | High confidence |
This family
| US 7,500,075 | In force Nov 2031 | Nov 2031 |
| US 8,370,596 | Term ended Dec 2021 | Dec 2021 |
| US 8,856,480 | Term ended Apr 2021 | Apr 2021 |
| US 9,257,161 | Term ended Apr 2021 | Apr 2021 |
| US 9,417,800 | Term ended Apr 2021 | Apr 2021 |
| US 10,146,445 | Term ended Apr 2021 | Apr 2021 |
| US 10,860,216 | this patent Apr 2021 | Apr 2021 |
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 |
|---|---|---|---|
| Nov 15, 2019 Reel 51030, frame 480 | Garrett, JR., Billy | Rambus Inc. | Assignment of Assignor's Interest |
| Dec 2, 2021 Reel 58298, frame 836 | Rambus Inc. | Highlands LLC | Assignment of Assignor's Interest |
| Dec 10, 2021 Reel 58956, frame 139 | Highlands LLC | Rampart Asset Management, LLC | Assignment of Assignor's 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
Note
The 64 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 9,417,800.
Citations
0
later US patents cite this one
That is below the median 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.