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 Nov 14, 2022.
Held by Rampart Asset Management, LLC
Filed Dec 19, 2012 as application 13/720,585 · Granted Oct 7, 2014
Base term, 20 years from filing
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
Oct 7, 2014
Oct 7, 2014
base term
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
None
Term adjustment
No prosecution delay on this record.
None
Terminal disclaimer
No disclaimer on this record.
1 of 1
Maintenance fees paid
One maintenance fee can end this term early, the one due 3.5 years from grant; the next one's grace period runs past the term end. This counts it if the record shows it paid.
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 is its 20-year base term, with no 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 Apr 17, 2001, when application 09/837,307, the earliest non-provisional in its chain, was filed (this one was filed Dec 19, 2012) | Apr 17, 2021 | 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 | None on record | no cap applied | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 1 maintenance fees paid | term ended | High confidence |
| USPTO status record | Recorded as expired for non-payment on Nov 14, 2022, 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 | this patent 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 | Term ended 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 |
|---|---|---|---|
| Sep 3, 2014 Reel 33661, frame 246 | Garrett, Billy, JR. | 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.
Citations
3
later US patents cite this one
That is below the median of utility patents granted in 2014 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.