Term ends Nov 5, 2027 · High confidence
20-year base term ended Oct 26, 2026
Held by Light Guide Innovations LLC
Filed Jan 7, 2009 as application 12/282,973 · Granted Aug 7, 2012
Base term plus 375 days of patent term adjustment (USPTO delay)
Today
2006
2027
Clock starts
Oct 26, 2006
Oct 26, 2006
Term ends
Nov 5, 2027
Nov 5, 2027
Granted
Aug 7, 2012
Aug 7, 2012
base term
patent term adjustment
fee events
Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
375
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.
7
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 375 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 26, 2006, when application PCT/KR2006/004389, the earliest non-provisional in its chain, was filed (this one was filed Jan 7, 2009) | Oct 26, 2026 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +375 days, USPTO patent term adjustment record | Nov 5, 2027 | 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 (reinstated) | High confidence |
| Computed term end | The steps above, in order | Nov 5, 2027 | High confidence |
This family
| US 8,237,352 | this patent Nov 2027 | Nov 2027 |
| US 8,723,411 | Term ended Oct 2026 | Oct 2026 |
| Application 90/015,742 | Pending not computed | not computed |
| Application 90/015,763 | Pending not computed | not computed |
| Application 90/015,807 | Pending not computed | not computed |
| Application 90/015,808 | Pending not computed | not computed |
6 of 7 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 |
|---|---|---|---|
| Jan 8, 2009 Reel 22074, frame 161 | Sohn, Choong-yong; Ahn, Young-joo; Ko, Young-wook | KDT Co., Ltd., | Assignment of Assignor's Interest |
| Jan 8, 2009 Reel 22074, frame 216 | KDT Co., Ltd. | LG Innotek Co., Ltd. | Assignment of Assignor's Interest |
| May 25, 2021 Reel 56366, frame 335 | LG Innotek Co., Ltd. | Suzhou Lekin Semiconductor Co., Ltd. | Assignment of Assignor's Interest |
| Jul 10, 2024 Reel 67949, frame 47 | Suzhou Lekin Semiconductor Co., Ltd. | Light Guide Innovations LLC | 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.
What's changing
Nov 2027
Term ends Nov 5, 2027. No further fees fall due before then
Note
The 375 days of patent term adjustment (USPTO delay) are read from the USPTO record, not recalculated by us
Citations
35
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.