Term ends May 11, 2032 · High confidence
20-year base term ends May 11, 2032
Held by Tyfone, Inc.
Filed Aug 21, 2012 as application 13/591,213 · Granted Jul 21, 2015
Base term plus 211 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2012
2032
Clock starts
May 11, 2012
May 11, 2012
Term ends
May 11, 2032
May 11, 2032
Granted
Jul 21, 2015
Jul 21, 2015
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
211
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 8,949,974.
2 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.
3
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 211 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 2 of 3 maintenance fees are 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 May 11, 2012, when application 13/470,139, the earliest non-provisional in its chain, was filed (this one was filed Aug 21, 2012) | May 11, 2032 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +211 days, USPTO patent term adjustment record | Dec 8, 2032 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 8,949,974) | capped to May 11, 2032 | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | May 11, 2032 | High confidence |
This family
| US 8,949,974 | In force May 2032 | May 2032 |
| Application 13/591,210 | Abandoned not computed | not computed |
| US 9,087,184 | this patent May 2032 | May 2032 |
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 |
|---|---|---|---|
| Mar 13, 2014 Reel 32423, frame 690 | Narendra, Siva G; Tadepalli, Prabhakar | Tyfone, Inc. | Assignment of Assignor's Interest |
| May 15, 2015 Reel 35685, frame 760 | Tyfone, Inc. | RPX Corporation | Security Interest |
| Aug 4, 2020 Reel 53396, frame 443 | RPX Corporation | Tyfone, Inc. | Release of Security 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
May 2032
Term ends May 11, 2032. Maintenance fees still fall due before then
Note
The 211 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 8,949,974.
Citations
10
later US patents cite this one
That is above the median of utility patents granted in 2015 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.