Collateral for a security interest recorded Oct 18, 2021 (Goldman Sachs Bank USA).
Term ends Aug 18, 2027 · High confidence
20-year base term ended Apr 3, 2021
Held by Mitchell International, Inc.
Filed Apr 3, 2001 as application 09/825,604 · Granted May 31, 2011
Base term plus 2328 days of patent term adjustment (USPTO delay)
Today
2001
2027
Clock starts
Apr 3, 2001
Apr 3, 2001
Term ends
Aug 18, 2027
Aug 18, 2027
Granted
May 31, 2011
May 31, 2011
base term
patent term adjustment
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
2,328
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.
2
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 2328 days past its 20-year base term on 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 3, 2001, when this application, 09/825,604, was filed | Apr 3, 2021 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +2328 days, USPTO patent term adjustment record | Aug 18, 2027 | 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 | Aug 18, 2027 | High confidence |
This family
| US 7,953,615 | this patent Aug 2027 | Aug 2027 |
| Application 13/118,266 | Abandoned not computed | not computed |
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 |
|---|---|---|---|
| Jan 18, 2002 Reel 12515, frame 274 | Aqulia, Anthony; Schrenk, Edward L.; Cole, Patrick; Griffin, David; Marsh, Mike; Hassold, Christian; Fisher, Frederick C.; Portal, Carlos | Ensera, Inc. | Assignment of Assignor's Interest |
| Jun 14, 2002 Reel 12987, frame 987 | Lyons, Thomas | Mitchell International, Inc. | Assignment of Assignor's Interest |
| Sep 10, 2002 Reel 13271, frame 465 | Ensera, Inc. | Mitchell International, Inc. | Assignment of Assignor's Interest |
| Jul 7, 2003 Reel 14230, frame 835 | WHCB Inc. | Mitchell International, Inc. | Assignment of Assignor's Interest |
| Jul 15, 2003 Reel 14265, frame 391 | Ensera, Inc. | WHCB Inc. | Certificate of Amendment of Fourth Amended and Restated Certificate of Incorporation of Ensera, Inc. |
| Aug 10, 2004 Reel 14964, frame 996 | Ensera, Inc. | Mitchell International, Inc. | Confirmatory Assignment |
| Aug 13, 2004 Reel 14981, frame 814 | Mitchell International, Inc. | Wachovia Bank, National Association, as Administrative Agent and First Lien Collateral Agent | Grant of Patent Security Interest |
| Aug 16, 2004 Reel 14990, frame 86 | Mitchell International, Inc. | Goldman Sachs Credit Partners L.P., as Administrative Agent and Second Lien Collateral Agent | Grant of Patent Security Interest |
| Apr 26, 2007 Reel 19204, frame 974 | Wachovia Bank, National Association, as Administrative Agent and Collateral Agent | Mitchell International, Inc. | Release of Secured Party's Patent Security Interest in Patents Originally Recorded on Reel/Frame: 014981/0814 (and Referenced on Schedule a to This Release of Patent Security Interest) |
| Apr 26, 2007 Reel 19204, frame 991 | Mitchell International, Inc. | Goldman Sachs Credit Partners L.P., as Collateral Agent | Grant of Patent Security Interest (First Lien) |
| Apr 26, 2007 Reel 19215, frame 23 | Mitchell International, Inc. | Sumitomo Mitsui Banking Corporation, as Collateral Agent | Grant of Patent Security Interest (Second Lien) |
| Oct 11, 2013 Reel 31397, frame 696 | Sumitomo Mitsui Banking Corporation | Mitchell International, Inc. | Termination and Release of Security Interest in Patents |
| Oct 11, 2013 Reel 31397, frame 739 | Goldman Sachs Credit Partners L.P. | Mitchell International, Inc. | Termination and Release of Security Interest in Patents-First Lien |
| Oct 11, 2013 Reel 31397, frame 760 | Goldman Sachs Credit Partners L.P. | Mitchell International, Inc. | Termination and Release of Security Interest in Patents-Second Lien |
| Oct 25, 2013 Reel 31495, frame 520 | Mitchell International, Inc. | Bank of America, N.A., as Collateral Agent | First Lien Security Interest |
| Oct 25, 2013 Reel 31495, frame 548 | Mitchell International, Inc. | Goldman Sachs Bank USA, as Collateral Agent | Second Lien Security Agreement |
| Nov 8, 2013 Reel 31607, frame 11 | Goldman Sachs Credit Partners, L.P., as Collateral Agent | Mitchell International, Inc. | Release (REEL 019204/FRAME 0991) |
| Nov 8, 2013 Reel 31607, frame 47 | Goldman Sachs Credit Partners, L.P., as Collateral Agent | Mitchell International, Inc. | Release (REEL 014990/FRAME0086) |
| Nov 8, 2013 Reel 31607, frame 79 | Sumitomo Mitsui Banking Corporation, as Collateral Agent | Mitchell International, Inc. | Release (REEL 019215/FRAME 0023) |
| Dec 1, 2017 Reel 44594, frame 143 | Bank Of America, N.a. | Mitchell International, Inc. | Release of 1ST Lien Security Interest |
| Dec 1, 2017 Reel 44594, frame 431 | Goldman Sachs Bank USA | Mitchell International, Inc. | Release of 2ND Lien Security Interest |
| Dec 8, 2017 Reel 44760, frame 975 | Mitchell International, Inc. | Jefferies Finance LLC, as Collateral Agent | First Lien Security Agreement |
| Dec 11, 2017 Reel 44823, frame 678 | Mitchell International, Inc. | Jefferies Finance LLC, as Collateral Agent | Second Lien Security Agreement |
| Oct 18, 2021 Reel 57841, frame 875 | Jefferies Finance LLC | Mitchell International, Inc. | Release of First Lien Security Interest (REEL 044760/0975) |
| Oct 18, 2021 Reel 57841, frame 921 | Jefferies Finance LLC | Mitchell International, Inc. | Release of Second Lien Security Interest (REEL 044823/0678) |
| Oct 18, 2021 Reel 57842, frame 170 | Mitchell International, Inc. | Goldman Sachs Bank USA | Second Lien Security Agreement |
| Oct 18, 2021 Reel 58014, frame 629 | Mitchell International, Inc. | Goldman Sachs Bank USA | First Lien Security Agreement |
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
Aug 2027
Term ends Aug 18, 2027. No further fees fall due before then
Note
The 2328 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
501
later US patents cite this one
That is top 1% 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.