Semiconductor light-emitting device having a member in a periphery made of a material whose color, transparency or adhesiveness changes overtime due to light or heat emission from the emitting element
US 8,421,102 Lapsed on the fee recordLapsed Apr 16, 2025 on the fee record · From the USPTO record
20-year base term ends Nov 13, 2029
Third maintenance fee unpaid; grace period ended.
Nov 13, 2009
Apr 16, 2025
Apr 16, 2013
Sep 15, 2030
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Nov 13, 2009, when this application, 12/618,043, was filed | Nov 13, 2029 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +306 days, USPTO patent term adjustment record | Sep 15, 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 Apr 16, 2025 | High confidence |
| Computed term end | The steps above, in order | Apr 16, 2025 | From the USPTO record |
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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