Apparatus for Cooling Heat Generating Spot of Electronic Device, Cooling Method Therefore, and Liquid Crystal Projector Apparatus
US 8,684,536 Lapsed on the fee recordLapsed Apr 1, 2026 on the fee record · High confidence
20-year base term ends Oct 11, 2027
Third maintenance fee unpaid; grace period ended.
Oct 11, 2007
Apr 1, 2026
Apr 1, 2014
Oct 11, 2027
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Oct 11, 2007, when the earliest non-provisional application in its chain was filed (this one was filed Mar 22, 2012) | Oct 11, 2027 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | None on file | no change | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 8,182,095) | resolves to Oct 11, 2027, no earlier than this term, so no change | High confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | lapsed Apr 1, 2026 | High confidence |
| Computed term end | The steps above, in order | Apr 1, 2026 | 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
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.