Term ends Sep 9, 2027 · Medium confidence
20-year base term ended Dec 28, 2025
Why Medium: A parent in the chain could not be resolved.
Held by Fluke Corporation
Filed Mar 4, 2014 as application 14/197,210 · Granted Jul 4, 2017
Base term plus 620 days of patent term adjustment (USPTO delay)
Today
2005
2027
Clock starts
Dec 28, 2005
Dec 28, 2005
Term ends
Sep 9, 2027
Sep 9, 2027
Granted
Jul 4, 2017
Jul 4, 2017
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
620
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
2 of 2
Maintenance fees paid
Two maintenance fees can end this term early, the ones due 3.5 and 7.5 years from grant; the third one's grace period runs past the term end. This counts the ones the record shows paid.
8
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 620 days past its 20-year base term on prosecution delay. 2 of 2 maintenance fees are paid so far. 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 Dec 28, 2005, when application 11/321,294, the earliest non-provisional in its chain, was filed (this one was filed Mar 4, 2014); a parent in its chain could not be resolved (the next row) | Dec 28, 2025 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +620 days, USPTO patent term adjustment record | Sep 9, 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 | 2 of 2 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Sep 9, 2027 | Medium confidence |
This family
| US 7,873,490 | In force Jan 2029 | Jan 2029 |
| Application PCT/US2006/048836 | PCT application no patent term | no patent term |
| US 8,386,179 | Term ended Mar 2026 | Mar 2026 |
| Application 13/733,867 | Abandoned not computed | not computed |
| US 9,697,644 | this patent Sep 2027 | Sep 2027 |
| US 10,692,278 | Term ended Oct 2026 | Oct 2026 |
| US 11,748,946 | In force Mar 2027 | Mar 2027 |
| Application 18/458,773 | 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 |
|---|---|---|---|
| May 8, 2014 Reel 32850, frame 687 | Macdonald, Willard; Macdonald, Robert | 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
Sep 2027
Term ends Sep 9, 2027. No further fees fall due before then
Note
The 620 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
16
later US patents cite this one
That is top 25% of utility patents granted in 2017 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.