Personal Emergency Communication System
US 7,231,200 Surrendered on reissueSurrendered on reissue Oct 19, 2010 · Medium confidence
20-year base term ended Sep 30, 2024
Why Medium: No fee event states this; the fee state is read from the payments the fee record holds.
Surrendered on reissue Oct 19, 2010 · its term and maintenance fees continue in US RE41,845.
Sep 30, 2004
Oct 19, 2010
Jun 12, 2007
May 29, 2025
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Sep 30, 2004, when this application, 10/955,327, was filed | Sep 30, 2024 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +241 days, USPTO patent term adjustment record | May 29, 2025 | 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 | No fee events in USPTO's record of this patent. A gap in the record, not evidence of lapse | no change | Medium confidence |
| Reissue | US RE41,845 issued Oct 19, 2010, and this patent's term continues in it (35 U.S.C. 251, 252) | surrendered Oct 19, 2010 | High confidence |
| Surrendered on reissue | The steps above, in order | Oct 19, 2010 | 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.