Term ended May 8, 2026 · High confidence
20-year base term ended Feb 9, 2025
Held by E2E Systems LLC
Filed Feb 9, 2005 as application 11/054,221 · Granted Mar 17, 2009
Base term plus 453 days of patent term adjustment (USPTO delay)
Today
Term ended May 8, 2026
2005
2026
Clock starts
Feb 9, 2005
Feb 9, 2005
Term ended
May 8, 2026
May 8, 2026
Granted
Mar 17, 2009
Mar 17, 2009
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
453
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.
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 453 days past its 20-year base term on prosecution delay. All three maintenance fees were paid, so no fee lapse ended it. 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 9, 2005, when this application, 11/054,221, was filed | Feb 9, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +453 days, USPTO patent term adjustment record | May 8, 2026 | 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 | term ended | High confidence |
| Computed term end | The steps above, in order | May 8, 2026 | High confidence |
This family
| US 7,505,751 | this patent May 2026 | May 2026 |
| US 8,565,164 | In force Aug 2027 | Aug 2027 |
| US 9,100,990 | Term ended no later than Feb 2025 | no later than Feb 2025 |
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 |
|---|---|---|---|
| Feb 9, 2005 Reel 16270, frame 484 | Backes, Floyd | Propagate Networks Inc. | Assignment of Assignor's Interest |
| Mar 8, 2005 Reel 15743, frame 534 | Propagate Networks, Inc. | Autocell Laboraties, Inc. | Change of Name |
| Mar 13, 2012 Reel 27852, frame 201 | Autocell Laboratories, Inc. | Piccata Fund Limited Liability Company | Assignment of Assignor's Interest |
| Sep 24, 2015 Reel 36675, frame 195 | Piccata Fund Limited Liability Company | Xenogenic Development Limited Liability Company | Merger |
| Nov 9, 2022 Reel 61710, frame 611 | Xenogenic Development Limited Liability Company | Intellectual Ventures II LLC | Assignment of Assignor's Interest |
| Apr 8, 2026 Reel 74310, frame 342 | Intellectual Ventures II LLC | Intellectual Ventures Assets 202 LLC | Assignment of Assignor's Interest |
| May 31, 2026 Reel 74804, frame 183 | Intellectual Ventures Assets 202 LLC | E2E Systems 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 453 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
35
later US patents cite this one
That is top 25% 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.