Also listed on Xangati, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Collateral for a security interest recorded Jan 10, 2022 (Midtown Madison Management LLC).
Term ends no later than Jul 25, 2028 · Medium confidence
20-year base term ends Jul 25, 2028
In force on USPTO's status record and by its fee record. A terminal disclaimer on file may shorten this term, possibly to a date already past; its reference document is unresolved, so the date above is an upper bound and no earlier date is guessed.
Filed Jul 25, 2008 as application 12/180,193 · Granted May 28, 2013
Base term, 20 years from filing
Today
2008
2028
Clock starts
Jul 25, 2008
Jul 25, 2008
Ends no later than
Jul 25, 2028
Jul 25, 2028
Granted
May 28, 2013
May 28, 2013
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.
Unresolved
Terminal disclaimer
On file, reference document not resolved, so the date above is an upper bound. We do not guess the cap.
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 is its 20-year base term, with no adjustment for prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. All three maintenance fees are recorded paid; no more fees are due. Confidence: Medium. 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 Jul 25, 2008, when this application, 12/180,193, was filed | Jul 25, 2028 | 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 | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium 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 | no later than Jul 25, 2028 | Medium confidence |
This family
| US 8,451,731 | this patent no later than Jul 2028 | no later than Jul 2028 |
| US 9,397,880 | In force Jul 2028 | Jul 2028 |
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 |
|---|---|---|---|
| Dec 4, 2008 Reel 21927, frame 83 | Lee, Rosanna; Pan, Xiaohong; Jagannathan, Rangaswamy; Sanders, Derek; Kakatkar, Kishor | Xangati, Inc. | Assignment of Assignor's Interest |
| Oct 11, 2016 Reel 39989, frame 821 | Xangati, Inc. | Western Alliance Bank | Security Interest |
| Oct 12, 2016 Reel 39995, frame 825 | Xangati, Inc. | Triplepoint Venture Growth BDC Corp. | Security Interest |
| Jun 20, 2018 Reel 46151, frame 755 | Xangati Inc. | Virtual Instruments Worldwide, Inc. | Assignment of Assignor's Interest |
| Sep 21, 2018 Reel 46941, frame 930 | Virtual Instruments Corporation; Virtual Instruments USA, Inc.; Xangati, Inc.; Virtual Instruments Worldwide, Inc. | Triplepoint Venture Growth BDC Corp. | Security Interest |
| Oct 10, 2018 Reel 47127, frame 767 | Virtual Instruments Worldwide, Inc. | Western Alliance Bank | Security Interest |
| Feb 2, 2021 Reel 55118, frame 634 | Zhu, Hong; Liu, Jing | Xangati, Inc. | Nunc Pro Tunc Assignment |
| Jan 10, 2022 Reel 58612, frame 102 | Western Alliance Bank | Virtual Instruments Worldwide, Inc. | Release of Security Interest |
| Jan 10, 2022 Reel 58612, frame 658 | Western Alliance Bank | Xangati, Inc. | Release of Security Interest |
| Jan 10, 2022 Reel 58668, frame 268 | Virtual Instruments Corporation; Virtual Instruments Worldwide, Inc.; Xangati, Inc. | Midtown Madison Management LLC | Security Interest |
| Jan 13, 2022 Reel 58652, frame 332 | Triplepoint Venture Growth BDC Corp., as the Secured Party | Virtual Instruments Worldwide, Inc. F/K/A Load Dynamix, Inc. | Release of Security Interest |
| Jan 13, 2022 Reel 58652, frame 685 | Triplepoint Venture Growth BDC Corp., as the Secured Party | Xangati, 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
Jul 2028
Term ends no later than Jul 25, 2028. No further fees fall due before then
Note
A terminal disclaimer is on file and its reference is not resolved. No cap is applied and none is guessed
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Jul 25, 2028. We will not guess the cap.
Citations
212
later US patents cite this one
That is top 5% of utility patents granted in 2013 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
This computed term ends no later than the date shown; an unresolved terminal disclaimer may end it earlier. 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.