Term ended May 30, 2023 · High confidence
20-year base term ended Oct 22, 2022
USPTO later recorded it as expired for non-payment on Oct 27, 2025.
Held by Rampart Asset Management, LLC
Filed Jun 17, 2011 as application 13/163,618 · Granted Sep 24, 2013
Base term plus 220 days of patent term adjustment (USPTO delay)
Today
Term ended May 30, 2023
2002
2026
Clock starts
Oct 22, 2002
Oct 22, 2002
Term ended
May 30, 2023
May 30, 2023
Granted
Sep 24, 2013
Sep 24, 2013
base term
patent term adjustment
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
220
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
No effect
Terminal disclaimer
Resolved from the filed document, referencing US 7,668,276, to May 30, 2023. The term already ends on or before that date, so the cap shortened nothing.
2 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
10
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 220 days past its 20-year base term on prosecution delay. A terminal disclaimer is resolved from the filed document, and it ends no earlier than this term, so it shortens nothing. 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 Oct 22, 2002, when application 10/278,708, the earliest non-provisional in its chain, was filed (this one was filed Jun 17, 2011) | Oct 22, 2022 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +220 days, USPTO patent term adjustment record | May 30, 2023 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 7,668,276) | resolves to May 30, 2023, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 2 maintenance fees paid | term ended | High confidence |
| USPTO status record | Recorded as expired for non-payment on Oct 27, 2025, after the term ended | no change | High confidence |
| Computed term end | The steps above, in order | May 30, 2023 | High confidence |
This family
| US 7,668,276 | In force Jul 2028 | Jul 2028 |
| US 7,965,567 | Term ended Jan 2024 | Jan 2024 |
| US 8,542,787 | this patent May 2023 | May 2023 |
| US 9,123,433 | Term ended Jan 2023 | Jan 2023 |
| US 9,099,194 | Term ended Jan 2023 | Jan 2023 |
| US 9,367,248 | Term ended Oct 2022 | Oct 2022 |
| US 9,721,642 | Term ended Oct 2022 | Oct 2022 |
| US 10,192,609 | Term ended Oct 2022 | Oct 2022 |
8 of 10 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 |
|---|---|---|---|
| Jun 25, 2015 Reel 35908, frame 362 | Hampel, Craig E.; Perego, Richard E.; Sidiropoulos, Stefanos S.; Tsern, Ely K.; Ware, Frederick A. | 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 220 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Terminal disclaimer
A terminal disclaimer resolved from the filed document, referencing US 7,668,276, ends no earlier than this term, so it caps nothing.
Citations
4
later US patents cite this one
That is below the median of utility patents granted in 2013 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.