Term ends Sep 3, 2030 · High confidence
20-year base term ends Sep 30, 2029
Filed Sep 30, 2009 as application 12/571,052 · Granted Apr 24, 2012
Base term plus 338 days of patent term adjustment (USPTO delay)
Today
2009
2030
Clock starts
Sep 30, 2009
Sep 30, 2009
Term ends
Sep 3, 2030
Sep 3, 2030
Granted
Apr 24, 2012
Apr 24, 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
338
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.
8
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 338 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 Sep 30, 2009, when this application, 12/571,052, was filed | Sep 30, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +338 days, USPTO patent term adjustment record | Sep 3, 2030 | 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 | Sep 3, 2030 | High confidence |
This family
| US 8,161,721 | this patent Sep 2030 | Sep 2030 |
| US 8,161,722 | In force Sep 2030 | Sep 2030 |
| US 8,904,743 | In force Aug 2030 | Aug 2030 |
| US 9,845,573 | In force Dec 2029 | Dec 2029 |
| US 10,683,610 | In force no later than May 2029 | no later than May 2029 |
| US 11,268,238 | In force Nov 2028 | Nov 2028 |
| US 11,718,956 | In force Nov 2028 | Nov 2028 |
7 of 8 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 |
|---|---|---|---|
| Sep 30, 2009 Reel 23309, frame 85 | Chiasson, David W.; Conrad, Craig M.; Moon, Jonathan E.; Petersen, Mark W.; Smith, David H. | Corning Cable Systems LLC | Assignment of Assignor's Interest |
| Sep 23, 2016 Reel 40126, frame 818 | Corning Cable Systems LLC | Corning Optical Communications LLC | Change of Name |
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
Sep 2030
Term ends Sep 3, 2030. No further fees fall due before then
Note
The 338 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
8
later US patents cite this one
That is above the median 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.