Term ends Aug 3, 2030 · High confidence
20-year base term ends Dec 22, 2030
Held by Accuray LLC
Filed May 16, 2012 as application 13/473,499 · Granted Jan 27, 2015
Base term plus 303 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer
Today
2010
2030
Clock starts
Dec 22, 2010
Dec 22, 2010
Term ends
Aug 3, 2030
Aug 3, 2030
Granted
Jan 27, 2015
Jan 27, 2015
base term
after the term ends
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
303
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 8,836,250.
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.
9
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 303 days past its 20-year base term on prosecution delay. A terminal disclaimer resolved from the filed document caps it earlier. 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 Dec 22, 2010, when application 12/976,787, the earliest non-provisional in its chain, was filed (this one was filed May 16, 2012) | Dec 22, 2030 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +303 days, USPTO patent term adjustment record | Oct 21, 2031 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 8,836,250) | capped to Aug 3, 2030 | 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 | Aug 3, 2030 | High confidence |
This family
| US 9,258,876 | In force Sep 2032 | Sep 2032 |
| US 9,167,681 | In force Jan 2032 | Jan 2032 |
| US 8,942,351 | this patent Aug 2030 | Aug 2030 |
| US 8,836,250 | In force Aug 2030 | Aug 2030 |
| US 9,415,240 | In force Sep 2033 | Sep 2033 |
| US 10,485,989 | In force Jun 2033 | Jun 2033 |
| US 10,843,010 | In force Jun 2032 | Jun 2032 |
| US 11,185,715 | In force Jun 2032 | Jun 2032 |
8 of 9 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 |
|---|---|---|---|
| Aug 7, 2012 Reel 28739, frame 182 | Cheung, Stephen Wah-kwan; Wang, Juwen; Miller, Roger Heering | Accuray, Inc. | Assignment of Assignor's Interest |
| Jan 13, 2016 Reel 37513, frame 170 | Accuray Incorporated; Tomotherapy Incorporated | Cerberus Business Finance, LLC, as Collateral Agent | Assignment for Security - Patents |
| Jun 15, 2017 Reel 42821, frame 580 | Cerberus Business Finance, LLC. as Collateral Agent | Accuray Incorporated; Tomotherapy Incorporated | Release of Security Interest |
| Jun 15, 2017 Reel 42826, frame 358 | Accuray Incorporated; Tomotherapy Incorporated | Midcap Funding IV Trust (as Successor by Assignment from Midcap Financial Trust) | Security Interest |
| Jun 15, 2017 reel/frame not recorded | Cerberus Business Finance, LLC. as Collateral Agent | Accuray Incorporated | Release of Security Interest |
| Jun 15, 2017 reel/frame not recorded | Cerberus Business Finance, LLC. as Collateral Agent | Tomotherapy Incorporated | Release of Security Interest |
| Dec 19, 2017 Reel 44910, frame 685 | Accuray Incorporated; Tomotherapy Incorporated | Midcap Financial Trust | Security Interest |
| Mar 1, 2019 Reel 48481, frame 804 | Midcap Funding X Trust (as Successor by Assignment from Midcap Funding IV Trust, as Successor by Assignment from Midcap Financial Trust), as Existing Administrative Agent | Midcap Funding IV Trust, as Successor to Existing Administrative Agent | Assignment of Security Agreements |
| May 14, 2021 Reel 56247, frame 1 | Accuray Incorporated; Tomotherapy Incorporated | Silicon Valley Bank, as Administrative and Collateral Agent | Security Interest |
| May 20, 2021 Reel 56318, frame 559 | Midcap Funding IV Trust (as Successor by Assignment from Midcap Funding X Trust, as Successor by Assignment from Midcap Funding IV Trust, as Successor by Assignment from Midcap Financial Trust) | Accuray Incorporated; Tomotherapy Incorporated | Release of Security Interest |
| May 20, 2021 Reel 56318, frame 751 | Midcap Financial Trust | Accuray Incorporated; Tomotherapy Incorporated | Release of Security Interest |
| May 20, 2021 reel/frame not recorded | Midcap Funding IV Trust (as Successor by Assignment from Midcap Funding X Trust, as Successor by Assignment from Midcap Funding IV Trust, as Successor by Assignment from Midcap Financial Trust) | Accuray Incorporated | Release of Security Interest |
| May 20, 2021 reel/frame not recorded | Midcap Funding IV Trust (as Successor by Assignment from Midcap Funding X Trust, as Successor by Assignment from Midcap Funding IV Trust, as Successor by Assignment from Midcap Financial Trust) | Tomotherapy Incorporated | Release of Security Interest |
| May 20, 2021 reel/frame not recorded | Midcap Financial Trust | Accuray Incorporated | Release of Security Interest |
| May 20, 2021 reel/frame not recorded | Midcap Financial Trust | Tomotherapy Incorporated | Release of Security Interest |
| Jun 6, 2025 Reel 71638, frame 34 | First-Citizens Bank & Trust Company | Accuray Incorporated | Release of Security Interest |
| Aug 13, 2025 Reel 72421, frame 584 | Accuray Incorporated | Accuray LLC | 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
Aug 2030
Term ends Aug 3, 2030. No further fees fall due before then
Note
The 303 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 8,836,250.
Citations
34
later US patents cite this one
That is top 25% of utility patents granted in 2015 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.