Term ends Jun 8, 2027 · Medium confidence
20-year base term ended Aug 26, 2024
Why Medium: A parent in the chain could not be resolved.
Held by Danfoss Power Electronics A/S
Filed Dec 7, 2006 as application 11/567,916 · Granted Jul 9, 2013
Base term plus 1016 days of patent term adjustment (USPTO delay)
Today
2004
2027
Clock starts
Aug 26, 2004
Aug 26, 2004
Term ends
Jun 8, 2027
Jun 8, 2027
Granted
Jul 9, 2013
Jul 9, 2013
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
1,016
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.
41
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 1016 days past its 20-year base term on prosecution delay. 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 26, 2004, when application 10/926,513, the earliest non-provisional in its chain, was filed (this one was filed Dec 7, 2006); a parent in its chain could not be resolved (the next row) | Aug 26, 2024 | 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 | +1016 days, USPTO patent term adjustment record | Jun 8, 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 | Jun 8, 2027 | Medium confidence |
This family
| US 7,874,808 | Lapsed on the fee record Jan 2023 | Jan 2023 |
| US 8,019,479 | In force Nov 2028 | Nov 2028 |
| US 8,469,675 | Lapsed on the fee record Jun 2025 | Jun 2025 |
| US 8,480,373 | this patent Jun 2027 | Jun 2027 |
| US 7,854,597 | Lapsed on the fee record Dec 2022 | Dec 2022 |
| US 7,686,589 | Term ended Apr 2025 | Apr 2025 |
| US 7,845,913 | Term ended Aug 2024 | Aug 2024 |
| US 8,602,745 | In force Mar 2028 | Mar 2028 |
8 of 41 applications in this family shown, earliest filings first. 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 |
|---|---|---|---|
| Mar 14, 2007 Reel 19014, frame 619 | Stiles, Robert W.; Berthelsen, Lars Hoffmann; Robol, Ronald B.; Kjaer, Gert; Runarsson, Einar Kjartan | Pentair Water Pool and S.p.A., Inc.; Danfoss Low Power Drives | Assignment of Assignor's Interest |
| Mar 14, 2007 reel/frame not recorded | Stiles, Robert W.; Robol, Ronald B.; Kjaer, Gert; Runarsson, Einar Kjartan; Berthelsen, Lars Hoffmann | Pentair Water Pool and S.p.A., Inc. | Assignment of Assignor's Interest |
| Mar 14, 2007 reel/frame not recorded | Stiles, Robert W.; Robol, Ronald B.; Kjaer, Gert; Runarsson, Einar Kjartan; Berthelsen, Lars Hoffmann | Danfoss Low Power Drives | Assignment of Assignor's Interest |
| Aug 28, 2019 Reel 50206, frame 463 | Danfoss Drives A/S | Danfoss Power Electronics A/S | Change of Name |
| Dec 10, 2019 Reel 51240, frame 490 | Stiles, Robert W.; Berthelsen, Lars Hoffmann; Robol, Ronald B.; Yahnker, Christopher; Cox, Everett; Steen, Donald; Murphy, Kevin; Woodcock, Walter J., JR.; Hruby, Daniel J.; Westermann-rasmussen, Peter; Kjaer, Gert; Runarsson, Einar Kjartan; Hansen, Arne Fink; Morando, Alberto; Lungeanu, Florin; Harvest, Nils-ole | Pentair Water Pool and S.p.A., Inc.; Danfoss Drives A/S | Assignment of Assignor's Interest |
| Dec 10, 2019 Reel 51240, frame 555 | Danfoss Drives A/S | Danfoss Power Electronics A/S | Change of Name |
| Dec 10, 2019 reel/frame not recorded | Cox, Everett; Hruby, Daniel J.; Robol, Ronald B.; Steen, Donald; Stiles, Robert W.; Yahnker, Christopher; Woodcock, Walter J., JR.; Murphy, Kevin; Hansen, Arne Fink; Runarsson, Einar Kjartan; Westermann-rasmussen, Peter; Harvest, Nils-ole; Kjaer, Gert; Lungeanu, Florin; Morando, Alberto; Berthelsen, Lars Hoffmann | Pentair Water Pool and S.p.A., Inc. | Assignment of Assignor's Interest |
| Dec 10, 2019 reel/frame not recorded | Cox, Everett; Hruby, Daniel J.; Robol, Ronald B.; Steen, Donald; Stiles, Robert W.; Yahnker, Christopher; Woodcock, Walter J., JR.; Murphy, Kevin; Hansen, Arne Fink; Runarsson, Einar Kjartan; Westermann-rasmussen, Peter; Harvest, Nils-ole; Kjaer, Gert; Lungeanu, Florin; Morando, Alberto; Berthelsen, Lars Hoffmann | Danfoss Drives A/S | 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.
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Alerts on its grants, lapses and transfers.
What's changing
Jun 2027
Term ends Jun 8, 2027. No further fees fall due before then
Note
The 1016 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
167
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
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.