Tuning Method of External Cavity Laser Diode, Variable Wavelength Laser Module, and Program of External Cavity Laser Diode Tuning
US 8,023,549 Lapsed on the fee recordLapsed Sep 20, 2023 on the fee record · High confidence
20-year base term ends Sep 30, 2029
Third maintenance fee unpaid; grace period ended.
Sep 30, 2009
Sep 20, 2023
Sep 20, 2011
Jan 13, 2030
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Sep 30, 2009, when this application, 12/570,524, was filed | Sep 30, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +105 days, USPTO patent term adjustment record | Jan 13, 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 | 2 of 3 maintenance fees paid | lapsed Sep 20, 2023 | High confidence |
| Computed term end | The steps above, in order | Sep 20, 2023 | High confidence |
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.
Not on this page: the patent's family, its recorded assignments and its citation count. USPTO's assignment records, linked above, list every recorded assignment.
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
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