Electric power saving apparatus comprising semi-conductor device to pass energy of infrared ray synthetic wavelength into electric cable using output pulse signal, electric circuit board structure for implementing the apparatus, and electric power saving method
US 7,373,535 Lapsed on the fee recordLapsed May 13, 2016 on the fee record · From the USPTO record
20-year base term ended Apr 21, 2026
Second maintenance fee unpaid; grace period ended.
Apr 21, 2006
May 13, 2016
May 13, 2008
Jun 10, 2026
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Apr 21, 2006, when the earliest non-provisional application in its chain was filed (this one was filed Sep 15, 2006); a parent in its chain could not be resolved (the next row) | Apr 21, 2026 | High confidence |
| Continuity chain | A parent in the chain could not be resolved | dated from this application's own claim | Medium confidence |
| Patent term adjustment | +50 days, USPTO patent term adjustment record | Jun 10, 2026 | 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 | 1 of 3 maintenance fees paid | lapsed May 13, 2016 | High confidence |
| Computed term end | The steps above, in order | May 13, 2016 | 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
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.