Also listed on KC Co., Ltd., an earlier holder on the record. The recorded assignments below show how it moved.
Term ends May 31, 2032 · High confidence
20-year base term ends Dec 29, 2029
Held by Kctech Co., Ltd.
Filed Dec 29, 2009 as application 12/649,234 · Granted Mar 3, 2015
Base term plus 884 days of patent term adjustment (USPTO delay)
Today
2009
2032
Clock starts
Dec 29, 2009
Dec 29, 2009
Term ends
May 31, 2032
May 31, 2032
Granted
Mar 3, 2015
Mar 3, 2015
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
884
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 884 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 Dec 29, 2009, when this application, 12/649,234, was filed | Dec 29, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +884 days, USPTO patent term adjustment record | May 31, 2032 | 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, 2032 | 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 |
|---|---|---|---|
| Oct 17, 2011 Reel 27072, frame 600 | Shin, In Chul; Kim, Kyung Joon | K. C. Tech Co., Ltd. | Assignment of Assignor's Interest |
| Mar 29, 2018 Reel 45390, frame 19 | K.C. Tech Co., Ltd. | KC Co., Ltd. | Change of Name |
| Apr 3, 2018 Reel 45427, frame 421 | KC Co., Ltd. | Kctech Co., Ltd. | 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.
Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
What's changing
May 2032
Term ends May 31, 2032. No further fees fall due before then
Note
The 884 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
504
later US patents cite this one
That is top 1% 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.