Also listed on Foamex L.P., an earlier holder on the record. The recorded assignments below show how it moved.
Collateral for a security interest recorded Nov 2, 2017 (U.S. Bank National Association).
Term ends Apr 24, 2029 · High confidence
20-year base term ends Apr 24, 2029
Held by Fxi, Inc.
Filed Apr 24, 2009 as application 12/429,778 · Granted Feb 15, 2011
Base term, 20 years from filing
Today
2009
2029
Clock starts
Apr 24, 2009
Apr 24, 2009
Term ends
Apr 24, 2029
Apr 24, 2029
Granted
Feb 15, 2011
Feb 15, 2011
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.
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.
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 is its 20-year base term, with no adjustment for 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 24, 2009, when this application, 12/429,778, was filed | Apr 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 | 3 of 3 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Apr 24, 2029 | High confidence |
This family
| US 8,209,804 | In force Jun 2029 | Jun 2029 |
| US 7,886,388 | this patent Apr 2029 | Apr 2029 |
| US D636,622 | Term ended Apr 2025 | Apr 2025 |
| US D652,715 | Term ended Jan 2026 | Jan 2026 |
| US 8,359,689 | In force Sep 2029 | Sep 2029 |
5 of 6 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 |
|---|---|---|---|
| Apr 24, 2009 Reel 22594, frame 848 | Warren, Stephen C.; Contreras, Jose D.; McCabe, Kerry L.; Niederoest, Beat B. | Foamex L.P. | Assignment of Assignor's Interest |
| Jul 20, 2009 Reel 23056, frame 120 | Foamex Innovations Operating Company | Wachovia Bank, National Association | Security Agreement |
| Aug 14, 2009 Reel 23094, frame 786 | Foamex Innovations, Inc. (Formerly MP Foam Dip LLC) | Foamex Innovations Operating Company | Assignment of Assignor's Interest |
| Dec 7, 2011 Reel 27340, frame 565 | Foamex Innovations Operating Company | Fxi, Inc. | Change of Name |
| Dec 2, 2015 Reel 37186, frame 125 | Wells Fargo Bank, National Association, Successor by Merger to Wachovia Bank, National Association, as Agent | Fxi, Inc. | Release of Security Interest |
| Dec 2, 2015 Reel 37189, frame 351 | Fxi, Inc. | Suntrust Bank, As Agent | Security Interest |
| Nov 2, 2017 Reel 44360, frame 430 | Suntrust Bank, As Agent | Fxi, Inc. | Release of Security Interest |
| Nov 2, 2017 Reel 44360, frame 806 | Fxi, Inc. | Suntrust Bank, As Agent | Security Interest |
| Nov 2, 2017 Reel 44779, frame 483 | Fxi, Inc. | U.S. Bank National Association | Security Interest |
| Feb 24, 2020 Reel 52004, frame 277 | Fxi, Inc.; Innocor, Inc. | U.S. Bank National Association | Security Interest |
| Feb 25, 2020 Reel 52019, frame 442 | Fxi, Inc.; Innocor, Inc. | Truist Bank, As Agent | Security Interest |
| Feb 25, 2020 Reel 52019, frame 659 | Truist Bank, as Agent, Successor-by-Merger to Suntrust Bank | Fxi, Inc. | Release of Security Interest |
| May 1, 2023 Reel 63492, frame 830 | Fxi, Inc. | U.S. Bank Trust Company, National Association, as Agent | Security Interest |
| May 1, 2023 Reel 63500, frame 738 | U.S. Bank Trust Company, National Association, as Agent | Fxi, Inc. | Release of Security Interest in Patents at R/F 044779/0483 |
| Nov 11, 2025 Reel 73572, frame 811 | Fxi, Inc. | U.S. Bank Trust Company, National Association, as Agent | Corrective Assignment to Correct the Supporting Documents Previously Recorded at Reel: 63492 Frame: 830. Assignor(S) Hereby Confirms the Security Interest. |
| Nov 20, 2025 Reel 72975, frame 724 | Fxi, Inc. | U.S. Bank Trust Company, National Association, as Agent | Security Interest |
| Nov 25, 2025 Reel 73697, frame 892 | Fxi, Inc. | U.S. Bank Trust Company, National Association, as Agent | Patent Security Agreement - Senior Secured Notes |
| Nov 25, 2025 Reel 73697, frame 899 | Fxi, Inc. | U.S. Bank Trust Company, National Association, as Agent | Patent Security Agreement - Junior Secured Notes |
| Nov 25, 2025 Reel 73698, frame 832 | U.S. Bank Trust Company, National Association, as Successor in Interest to U.S. Bank National Association | Fxi, Inc. (in Its Own Capacity and as Successor by Merger to Innocor, Inc.) | Release of Security Interest in Patents Recorded at Reel/Frame 052004/0277 |
| Nov 25, 2025 Reel 73698, frame 839 | U.S. Bank Trust Company, National Association | Fxi, Inc. | Release of Security Interest in Patents Recorded at Reel/Frame 063492/0830 |
| Jan 28, 2026 Reel 75043, frame 349 | Bank of America, N.A., as Collateral Agent | Foamex L.P. | Bankruptcy Order Releasing All Liens |
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
Apr 2029
Term ends Apr 24, 2029. No further fees fall due before then
Citations
36
later US patents cite this one
That is top 25% of utility patents granted in 2011 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.