Term ends Jul 17, 2033 · High confidence
20-year base term ends May 14, 2032
Held by Heartflow, Inc.
Filed Oct 21, 2020 as application 17/075,892 · Granted Nov 28, 2023
Base term plus 429 days of patent term adjustment (USPTO delay)
Today
2012
2033
Clock starts
May 14, 2012
May 14, 2012
Term ends
Jul 17, 2033
Jul 17, 2033
Granted
Nov 28, 2023
Nov 28, 2023
base term
patent term adjustment
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
429
Days of term adjustment
Read from the USPTO patent term adjustment record, not recalculated here.
None
Terminal disclaimer
No disclaimer on this record.
0 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.
16
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 429 days past its 20-year base term on prosecution delay. 0 of 2 maintenance fees are paid so far. 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 May 14, 2012, when application 13/470,802, the earliest non-provisional in its chain, was filed (this one was filed Oct 21, 2020) | May 14, 2032 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +429 days, USPTO patent term adjustment record | Jul 17, 2033 | 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 | 0 of 2 maintenance fees paid | In force | High confidence |
| Computed term end | The steps above, in order | Jul 17, 2033 | High confidence |
This family
| US 8,548,778 | In force May 2032 | May 2032 |
| Application PCT/US2013/040714 | PCT application no patent term | no patent term |
| US 8,706,457 | In force May 2032 | May 2032 |
| US 9,517,040 | In force Sep 2033 | Sep 2033 |
| US 8,768,669 | In force May 2032 | May 2032 |
| US 8,768,670 | In force May 2032 | May 2032 |
| US 8,855,984 | In force May 2032 | May 2032 |
| US 8,914,264 | In force May 2032 | May 2032 |
8 of 16 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 |
|---|---|---|---|
| Oct 22, 2020 Reel 54133, frame 195 | Hart, Gregory R.; Stevens, John H. | Heartflow, Inc. | Assignment of Assignor's Interest |
| Jan 20, 2021 Reel 55037, frame 890 | Heartflow, Inc. | Hayfin Services LLP | Security Interest |
| Jun 18, 2024 Reel 67775, frame 966 | Heartflow, Inc. | Hayfin Services LLP | Security Interest |
| Jun 21, 2024 Reel 67801, frame 32 | Hayfin Services LLP | Heartflow, Inc. | Release of Security Interest |
| Sep 11, 2025 Reel 72876, frame 775 | Hayfin Services LLP | Heartflow, Inc. | Release of Security 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
Jul 2033
Term ends Jul 17, 2033. Maintenance fees still fall due before then
Note
The 429 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
87
later US patents cite this one
That is top 1% of utility patents granted in 2023 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.