Also listed on Syphermedia International, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends Feb 24, 2029 · High confidence
20-year base term ends Feb 24, 2029
Held by Rambus Inc.
Filed Aug 11, 2017 as application 15/675,418 · Granted Feb 25, 2020
Base term, 20 years from filing
Today
2009
2029
Clock starts
Feb 24, 2009
Feb 24, 2009
Term ends
Feb 24, 2029
Feb 24, 2029
Granted
Feb 25, 2020
Feb 25, 2020
base term
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 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.
22
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. 1 of 2 maintenance fees is paid so far. 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 Feb 24, 2009, when application 12/380,094, the earliest non-provisional in its chain, was filed (this one was filed Aug 11, 2017) | Feb 24, 2029 | 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 2 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Feb 24, 2029 | High confidence |
This family
| US 8,151,235 | Lapsed on the fee record Apr 2024 | Apr 2024 |
| US 8,418,091 | Lapsed on the fee record Apr 2025 | Apr 2025 |
| Application 61/436,485 | Provisional application no patent term | no patent term |
| Application PCT/US2012/022791 | PCT application no patent term | no patent term |
| US 8,510,700 | Lapsed on the fee record Aug 2025 | Aug 2025 |
| Application 61/606,260 | Provisional application no patent term | no patent term |
| Application PCT/US2013/028761 | PCT application no patent term | no patent term |
| US 9,355,199 | Lapsed on the fee record May 2024 | May 2024 |
8 of 22 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 |
|---|---|---|---|
| Aug 11, 2017 Reel 43273, frame 12 | Cocchi, Ronald P.; Chow, Lap Wai; Baukus, James P.; Wang, Bryan J. | Syphermedia International, Inc. | Assignment of Assignor's Interest |
| Feb 27, 2018 Reel 45053, frame 301 | Syphermedia International, Inc. | Inside Secure S.A. | Assignment of Assignor's Interest |
| Feb 27, 2019 Reel 48449, frame 887 | Inside Secure | Glas Sas, As Security Agent | Security Interest |
| Oct 7, 2019 Reel 50647, frame 428 | Inside Secure | Verimatrix | Change of Name |
| Oct 16, 2019 Reel 50733, frame 3 | Verimatrix | Verimatrix | Change of Address |
| Nov 21, 2019 Reel 51076, frame 306 | Glas Sas, As Agent | Inside Secure | Partial Release of Security Interest in Patent Collateral |
| Dec 12, 2019 Reel 51262, frame 413 | Verimatrix | 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
Feb 2029
Term ends Feb 24, 2029. Maintenance fees still fall due before then
Citations
4
later US patents cite this one
That is above 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.
In force means the term is running and no lapse is on record. It is not a finding that the patent is valid.