Also listed on Quantum Molecular Technologies, Inc., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends May 31, 2031 · High confidence
20-year base term ends Oct 10, 2028
Filed Oct 10, 2008 as application 12/249,274 · Granted Sep 18, 2012
Base term plus 963 days of patent term adjustment (USPTO delay)
Today
2008
2031
Clock starts
Oct 10, 2008
Oct 10, 2008
Term ends
May 31, 2031
May 31, 2031
Granted
Sep 18, 2012
Sep 18, 2012
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
963
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.
This patent's term runs 963 days past its 20-year base term on prosecution delay. 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 Oct 10, 2008, when this application, 12/249,274, was filed | Oct 10, 2028 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +963 days, USPTO patent term adjustment record | May 31, 2031 | 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 | May 31, 2031 | High confidence |
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 24, 2008 Reel 22027, frame 21 | Saveliev, Valeri | Quantum Molecular Technologies, Inc. | Assignment of Assignor's Interest |
| Aug 17, 2012 Reel 28803, frame 604 | Quantum Molecular Technologies, Inc. | Positron Corporation | Nunc Pro Tunc Assignment |
| May 15, 2018 Reel 45810, frame 750 | Positron Corporation | Semiconductor Components Industries, LLC | Assignment of Assignor's Interest |
| Oct 16, 2020 Reel 54090, frame 617 | Semiconductor Components Industries, LLC; Fairchild Semiconductor Corporation; On Semiconductor Connectivity Solutions, Inc. | Deutsche Bank AG New York Branch, as Collateral Agent | Security Interest |
| Jun 23, 2023 Reel 64081, frame 167 | Deutsche Bank AG New York Branch, as Collateral Agent | Semiconductor Components Industries, LLC; Fairchild Semiconductor Corporation | Release of Security Interest in Patents Recorded at Reel 054090, Frame 0617 |
| Jun 23, 2023 reel/frame not recorded | Deutsche Bank AG New York Branch, as Collateral Agent | Semiconductor Components Industries, LLC | Release of Security Interest in Patents Recorded at Reel 054090, Frame 0617 |
| Jun 23, 2023 reel/frame not recorded | Deutsche Bank AG New York Branch, as Collateral Agent | Fairchild Semiconductor Corporation | Release of Security Interest in Patents Recorded at Reel 054090, Frame 0617 |
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
May 2031
Term ends May 31, 2031. No further fees fall due before then
Note
The 963 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
30
later US patents cite this one
That is top 25% of utility patents granted in 2012 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.