Term ends no later than Jan 31, 2028 · Medium confidence
20-year base term ends Aug 22, 2027
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.
Held by Fluke Corporation
Filed Aug 22, 2007 as application 11/894,893 · Granted Apr 6, 2010
Base term plus 162 days of patent term adjustment (USPTO delay)
Today
2007
2028
Clock starts
Aug 22, 2007
Aug 22, 2007
Ends no later than
Jan 31, 2028
Jan 31, 2028
Granted
Apr 6, 2010
Apr 6, 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
162
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
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 runs 162 days past its 20-year base term on 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 Aug 22, 2007, when this application, 11/894,893, was filed | Aug 22, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +162 days, USPTO patent term adjustment record | Jan 31, 2028 | 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 Jan 31, 2028 | Medium confidence |
This family
| US 7,690,123 | this patent no later than Jan 2028 | no later than Jan 2028 |
| US 7,861,422 | In force no later than Aug 2027 | no later than Aug 2027 |
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 |
|---|---|---|---|
| Jul 10, 2009 Reel 22944, frame 976 | Macdonald, Willard S. | Solmetric Corporation | Assignment of Assignor's Interest |
| Feb 7, 2018 Reel 44860, frame 424 | Vivint Solar, Inc. | Goldman Sachs Lending Partners LLC, as Collateral Agent | Security Interest |
| Dec 18, 2019 Reel 51367, frame 844 | Goldman Sachs Lending Partners LLC, as Collateral Agent | Vivint Solar, Inc. | Release of Security Interest in Intellectual Property at Reel/Frame No. 44860/0424 |
| Mar 10, 2022 Reel 59229, frame 453 | Solmetric Corporation | Sunrun Inc. | Assignment of Assignor's Interest |
| Jun 1, 2023 Reel 64258, frame 325 | Sunrun Inc. | Solmetric Corporation | Assignment of Assignor's Interest |
| Dec 15, 2023 Reel 65881, frame 308 | Solmetric | Fluke Corporation | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
Jan 2028
Term ends no later than Jan 31, 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
Note
The 162 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Open question
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Jan 31, 2028. We will not guess the cap.
Citations
18
later US patents cite this one
That is above 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
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.