Also listed on Highlands LLC, an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Nov 4, 2031 · High confidence
20-year base term ended Apr 17, 2021
Held by Rampart Asset Management, LLC
Filed Apr 17, 2001 as application 09/837,307 · Granted Mar 3, 2009
Base term plus 3853 days of patent term adjustment (USPTO delay)
Today
2001
2031
Clock starts
Apr 17, 2001
Apr 17, 2001
Term ends
Nov 4, 2031
Nov 4, 2031
Granted
Mar 3, 2009
Mar 3, 2009
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
3,853
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
3 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.
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 3853 days past its 20-year base term on prosecution delay. All three maintenance fees are recorded paid; no more fees are due. 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 this application, 09/837,307, was filed | Apr 17, 2021 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +3853 days, USPTO patent term adjustment record | Nov 4, 2031 | 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Nov 4, 2031 | High confidence |
This family
| US 7,500,075 | this patent 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 | 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 |
|---|---|---|---|
| Apr 17, 2001 Reel 11732, frame 399 | 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
Nov 2031
Term ends Nov 4, 2031. No further fees fall due before then
Note
The 3853 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
22
later US patents cite this one
That is above the median of utility patents granted in 2009 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.