Term ends Apr 7, 2027 · High confidence
20-year base term ended May 13, 2025
Held by Elementis SRL, Inc.
Filed May 13, 2005 as application 11/129,072 · Granted Jun 8, 2010
Base term plus 694 days of patent term adjustment (USPTO delay)
Today
2005
2027
Clock starts
May 13, 2005
May 13, 2005
Term ends
Apr 7, 2027
Apr 7, 2027
Granted
Jun 8, 2010
Jun 8, 2010
base term
patent term adjustment
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
694
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 694 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 May 13, 2005, when this application, 11/129,072, was filed | May 13, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +694 days, USPTO patent term adjustment record | Apr 7, 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 | Apr 7, 2027 | High confidence |
This family
| US 7,731,943 | this patent Apr 2027 | Apr 2027 |
| Application PCT/US2005/018584 | PCT application no patent term | no patent term |
| US 8,124,059 | Term ended Jan 2026 | Jan 2026 |
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 |
|---|---|---|---|
| May 13, 2005 Reel 16572, frame 952 | Harper, Thomas L.; Mehta, Shailesh; Rosenberg, Allan H. | Somerville Technology Group, Inc. D/B/A Summit Research Labs | Assignment of Assignor's Interest |
| Aug 16, 2006 Reel 18120, frame 18 | Summit Research Labs, Inc.; Summit Research Labs Holding Company | MVC Capital, Inc. | Security Agreement |
| Aug 17, 2006 Reel 18120, frame 368 | Summit Research Labs, Inc. | Guggenheim Corporate Funding, LLC | Security Agreement |
| Mar 3, 2008 Reel 20582, frame 553 | Summit Research Labs, Inc.; Summit Research Labs Holding Company; Reheis, Inc.; WBS Carbons Acquisition Corp. | Churchill Financial LLC, as Administrative Agent | Security Agreement |
| Mar 14, 2008 Reel 20654, frame 68 | Summit Research Labs, Inc.; Summit Research Labs Holding Company; Reheis, Inc.; WBS Carbons Acquisition Corp. | MVC Capital, Inc. | Security Agreement |
| Apr 19, 2010 Reel 24250, frame 198 | Patel, Suresh | Somerville Technology Group, Inc. D/B/A Summit Research Labs | Assignment of Assignor's Interest |
| Apr 21, 2010 Reel 24284, frame 21 | Somerville Technology Group, Inc. D/B/A Summit Research Labs | Summit Research Labs, Inc. | Corrective Assignment to Correct the Assignor and Assignee Names, Previously Recorded on Reel 024250 Frame 0198. Assignor(S) Hereby Confirms the Assignment. |
| Mar 28, 2013 Reel 30106, frame 449 | Guggenheim Corporate Funding, LLC, as Administrative Agent | Summit Research Labs, Inc. | Termination and Release of Patent Security Agreement |
| Apr 1, 2013 Reel 30122, frame 615 | MVC Capital, Inc. | Summit Research Labs, Inc.; Summit Research Labs Holding Company | Termination and Release of Security Interest in Patents |
| Apr 1, 2013 Reel 30122, frame 653 | MVC Capital, Inc., as Agent | Summit Research Labs, Inc.; Summit Research Labs Holding Company; Reheis, Inc.; WBS Carbons Acquisition Corp. | Termination and Release of Security Interest in Patents |
| Apr 1, 2013 Reel 30122, frame 898 | Summit Research Labs, Inc. | Citizens Bank of Pennsylvania, as Administrative Agent | Security Agreement |
| Apr 1, 2013 reel/frame not recorded | MVC Capital, Inc. | Summit Research Labs, Inc. | Termination and Release of Security Interest in Patents |
| Apr 1, 2013 reel/frame not recorded | MVC Capital, Inc. | Summit Research Labs Holding Company | Termination and Release of Security Interest in Patents |
| Apr 1, 2013 reel/frame not recorded | MVC Capital, Inc., as Agent | Summit Research Labs, Inc. | Termination and Release of Security Interest in Patents |
| Apr 1, 2013 reel/frame not recorded | MVC Capital, Inc., as Agent | Summit Research Labs Holding Company | Termination and Release of Security Interest in Patents |
| Apr 1, 2013 reel/frame not recorded | MVC Capital, Inc., as Agent | Reheis, Inc. | Termination and Release of Security Interest in Patents |
| Apr 1, 2013 reel/frame not recorded | MVC Capital, Inc., as Agent | WBS Carbons Acquisition Corp. | Termination and Release of Security Interest in Patents |
| Apr 3, 2013 Reel 30140, frame 24 | Summit Research Labs, Inc. | MVC Capital, Inc., as Administrative Agent | Notice of Grant of Security Interest in Patents |
| Apr 30, 2013 Reel 30318, frame 63 | Churchill Financial LLC, as Administrative Agent | Summit Research Labs, Inc.; Summit Research Labs Holding Company; Reheis, Inc.; WBS Carbons Acquisition Corp. | Release of Security Interest |
| Apr 30, 2013 reel/frame not recorded | Churchill Financial LLC, as Administrative Agent | Summit Research Labs, Inc. | Release of Security Interest |
| Apr 30, 2013 reel/frame not recorded | Churchill Financial LLC, as Administrative Agent | Summit Research Labs Holding Company | Release of Security Interest |
| Apr 30, 2013 reel/frame not recorded | Churchill Financial LLC, as Administrative Agent | Reheis, Inc. | Release of Security Interest |
| Apr 30, 2013 reel/frame not recorded | Churchill Financial LLC, as Administrative Agent | WBS Carbons Acquisition Corp. | Release of Security Interest |
| Dec 1, 2014 Reel 34292, frame 791 | MVC Capital, Inc., as Administrative Agent | Summit Research Labs, Inc. | Release of Security Interest |
| Mar 27, 2017 Reel 41749, frame 683 | Citizens Bank of Pennsylvania, as Administrative Agent | Summit Research Labs, Inc. | Release of Security Interest |
| Jan 23, 2018 Reel 45129, frame 67 | Summit Research Labs, Inc. | Elementis SRL, Inc. | Change of Name |
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
Apr 2027
Term ends Apr 7, 2027. No further fees fall due before then
Note
The 694 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
1
later US patent cites this one
That is below the median of utility patents granted in 2010 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.