Lapsed Oct 14, 2026 on the fee record · Low confidence
20-year base term ends Sep 15, 2031
Third maintenance fee unpaid; grace period ended. The USPTO has not yet posted the lapse.
Sep 15, 2011
Oct 14, 2026
Oct 14, 2014
Oct 8, 2032
Its term would have run to Oct 8, 2032: its 20-year base term plus 389 days of term adjustment for prosecution delay. A terminal disclaimer is on file with no resolved reference, so no cap is applied and none is guessed. Confidence: Low. from the record
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Sep 15, 2011, when this application, 13/233,663, was filed | Sep 15, 2031 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +389 days, USPTO patent term adjustment record | Oct 8, 2032 | High confidence |
| Terminal disclaimer cap | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | No fee event states this; the fee state is read from the payments the fee record holds; the fee record shows no payment for this window, and USPTO's status still reads "Patented Case" | lapsed Oct 14, 2026 | Low confidence |
| Computed term end | The steps above, in order | Oct 14, 2026 | Low confidence |
Assignments
| Recorded | Assignor | Assignee | Conveyance |
|---|---|---|---|
| Nov 29, 2011 Reel 27289, frame 189 | Singh, Vinit; Frysz, Christine A. | Nucurrent, Inc. | Assignment of Assignor's Interest |
| Mar 11, 2015 Reel 35143, frame 182 | Nucurrent, Inc. | Nucurrent, Inc. | Merger |
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.
What's changing
A terminal disclaimer is on file (approved) and its reference document is not resolved. A disclaimer would cap the term earlier than Oct 14, 2026. We will not guess the cap.