Term ends Apr 9, 2029
Term ends Apr 14, 2024
Base term plus 1821 days of PTA
Today
20y-from-earliest-nonprovisional
Expires Apr 2029
2004
2029
Clock starts
Apr 14, 2004
Apr 14, 2004
Granted
Dec 21, 2010
Dec 21, 2010
Term ends
Apr 9, 2029
Apr 9, 2029
base term
patent term adjustment
fee events
Computed Aug 22, 2026 · countdowns run from that date · how we know
1,821
Days of PTA
1
Applications in this family
This patent's term runs 1821 days past the statutory base term on prosecution delay. All three maintenance fees are paid, so nothing but the term itself will end it. Confidence: High. from the record
How this date was computed
Every step shows its rule, its 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, 20y-from-earliest-nonprovisional | Clock starts Apr 14, 2004 | Apr 14, 2024 | High |
| Patent term adjustment | +1821 days, USPTO PTA record | Apr 9, 2029 | High |
| Patent term extension | None on file | no change | High |
| Terminal disclaimer cap | None found; file history unreviewed | no cap applied | Medium |
| Fee events | 3 of 3 maintenance fees paid | in-force | High |
| Computed term end | The steps above, in order | Apr 9, 2029 | High |
The computation, verbatim
base=20y-from-earliest-nonprovisional: 2004-04-14+20y | =2024-04-14 | PTA+1821d=2029-04-09 | PTE:none | TD:none | paid 4yr@2014-04-06,8yr@2018-06-05,12yr@2022-06-07 | status=in-force@2029-04-09
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 |
|---|---|---|---|
| Apr 14, 2004 reel/frame not recorded | Alworth, Samuel | Lee, Shih-Jong J. | Assignment of Assignor's Interest |
| Apr 27, 2008 reel/frame not recorded | Lee, Shih-Jong J., DR. | Svision LLC | Assignment of Assignor's Interest |
| May 30, 2008 reel/frame not recorded | Svision LLC | Drvision Technologies LLC | Assignment of Assignor's Interest |
| Dec 18, 2020 reel/frame not recorded | Drvision Technologies LLC | Svision LLC | Assignment of Assignor's Interest |
| Mar 16, 2021 reel/frame not recorded | Svision LLC | Leica Microsystems Inc. | Assignment of Assignor's Interest |
| Oct 4, 2021 reel/frame not recorded | Leica Microsystems Inc. | Leica Microsystems CMS GMBH | Assignment of Assignor's Interest |
alerts on grants, lapses, transfers
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What's changing
Aug 22, 2026Apr 2029
Term ends. No further fees fall due before then
Note
The 1821 days of PTA are read from the USPTO record, not recalculated by us
Citations
1
later US patent cite this one
That is below the median of patents granted in 2010, the only group it is compared against.
How we rank
Every date shows its work: base rule, PTA, PTE, disclaimer caps, fee overlay, 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.