Term ended Dec 4, 2025 · High confidence
20-year base term ended Nov 30, 2025
USPTO later recorded it as expired for non-payment on May 25, 2026.
Held by Rambus Inc.
Filed Sep 26, 2012 as application 13/627,870 · Granted Apr 22, 2014
Base term plus 4 days of patent term adjustment (USPTO delay)
Today
Term ended Dec 4, 2025
2005
2026
Clock starts
Nov 30, 2005
Nov 30, 2005
Term ended
Dec 4, 2025
Dec 4, 2025
Granted
Apr 22, 2014
Apr 22, 2014
base term
after the term ends
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
4
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
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.
6
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 4 days past its 20-year base term on 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 Nov 30, 2005, when application 11/292,407, the earliest non-provisional in its chain, was filed (this one was filed Sep 26, 2012) | Nov 30, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +4 days, USPTO patent term adjustment record | Dec 4, 2025 | 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 | 2 of 2 maintenance fees paid | term ended | High confidence |
| USPTO status record | Recorded as expired for non-payment on May 25, 2026, after the term ended | no change | High confidence |
| Computed term end | The steps above, in order | Dec 4, 2025 | High confidence |
This family
| US 7,610,417 | Lapsed on the fee record Oct 2021 | Oct 2021 |
| US 8,078,775 | Lapsed on the fee record Dec 2023 | Dec 2023 |
| US 8,281,055 | Lapsed on the fee record Oct 2024 | Oct 2024 |
| US 8,707,009 | this patent Dec 2025 | Dec 2025 |
| US 10,043,560 | Lapsed on the fee record Aug 2026 | Aug 2026 |
| US 11,302,371 | In force Nov 2026 | Nov 2026 |
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 |
|---|---|---|---|
| Dec 18, 2012 Reel 29488, frame 170 | Shaeffer, Ian | Rambus Inc. | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Note
The 4 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
6
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.