Personal Emergency Communication System
US 7,933,579 Term endedTerm ended Jun 17, 2023 · Medium confidence
20-year base term ended Sep 30, 2024
Why Medium: The disclaimer's references carry disclaimers of their own not yet read (US 7,315,736), so the cap could be lower.
Sep 30, 2004
Jun 17, 2023
Apr 26, 2011
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Sep 30, 2004, when the earliest non-provisional application in its chain was filed (this one was filed Dec 3, 2007) | Sep 30, 2024 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +747 days, USPTO patent term adjustment record | Oct 17, 2026 | High confidence |
| Terminal disclaimer cap | Disclaimer resolved from the filed document (refs US 7,315,736, US 7,321,200) | capped to Jun 17, 2023 | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 3 of 3 maintenance fees paid | term ended | High confidence |
| Computed term end | The steps above, in order | Jun 17, 2023 | Medium 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.