Lapsed May 15, 2026 on the fee record · Medium confidence
20-year base term ends Nov 17, 2029
Why Medium: The disclaimer's references carry disclaimers of their own not yet read (US 8,551,083), so the cap could be lower.
Second maintenance fee unpaid; grace period ended.
Held by Varian Medical Systems, Inc.
Filed Oct 8, 2013 as application 14/049,064 · Granted May 15, 2018
Base term, 20 years from filing, plus 1046 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
Lapsed May 15, 2026
2009
2031
Clock starts
Nov 17, 2009
Nov 17, 2009
No longer in force
May 15, 2026
May 15, 2026
Granted
May 15, 2018
May 15, 2018
Term would have run to
Oct 28, 2031
Oct 28, 2031
base term
patent term adjustment
after the term ends
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
1,046
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
Capped
Terminal disclaimer
Resolved from the filed document, referencing US 8,414,570, US 8,551,083.
1 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.
7
Family applications on record here
Applications sharing this one's continuity chain whose file history this site holds. The family may have others.
Its term would have run to Oct 28, 2031: its 20-year base term plus 1046 days of term adjustment for prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 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 Nov 17, 2009, when application 12/620,002, the earliest non-provisional in its chain, was filed (this one was filed Oct 8, 2013) | Nov 17, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +1046 days, USPTO patent term adjustment record | Sep 28, 2032 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 8,414,570, US 8,551,083) | capped to Oct 28, 2031 | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 1 of 3 maintenance fees paid | lapsed May 15, 2026 | High confidence |
| Computed term end | The steps above, in order | May 15, 2026 | Medium confidence |
This family
| US 8,414,570 | In force Nov 2031 | Nov 2031 |
| US 8,551,083 | Lapsed on the fee record Oct 2025 | Oct 2025 |
| US 9,993,294 | Lapsed on the fee record Jun 2026 | Jun 2026 |
| Application 13/020,483 | Abandoned not computed | not computed |
| US 9,968,399 | this patent May 2026 | May 2026 |
| US 11,253,316 | Lapsed on the fee record Feb 2026 | Feb 2026 |
| US 12,318,134 | In force no later than May 2031 | no later than May 2031 |
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 5, 2013 Reel 31722, frame 827 | Turner, Paul F.; Youd, Thomas L.; Hamilton, Brianne | BSD Medical Corporation | Assignment of Assignor's Interest |
| Apr 6, 2015 Reel 35366, frame 936 | BSD Medical Corporation | Perseon Corporation | Change of Name |
| Sep 14, 2016 Reel 39743, frame 682 | Perseon Corporation | Scion Medical Technologies, LLC | Assignment of Assignor's Interest |
| May 31, 2017 Reel 42550, frame 264 | Scion Medical Technologies, LLC | Perseon Corporation | Assignment of Assignor's Interest |
| Mar 15, 2019 Reel 48609, frame 886 | Perseon Corporation | Endocare, Inc. | Assignment of Assignor's Interest |
| Jul 16, 2019 Reel 49760, frame 263 | Perseon Corporation | Endocare, Inc. | Assignment of Assignor's Interest |
| Mar 24, 2021 Reel 56940, frame 233 | Endocare, Inc. | Varian Medical Systems, Inc. | 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
Note
The 1046 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Disclaimer cap
This term is capped by a terminal disclaimer resolved from the filed document, referencing US 8,414,570, US 8,551,083.
Citations
5
later US patents cite this one
That is above the median of utility patents granted in 2018 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.