Personal Emergency Communication System
US RE41,845 Lapsed on the fee recordLapsed Jun 12, 2019 on the fee record · Low confidence
20-year base term ended Sep 30, 2024
Third maintenance fee unpaid; grace period ended.
Reissue of US 7,231,200, which was surrendered when this reissue was granted; its term and maintenance fees continue here.
Sep 30, 2004
Jun 12, 2019
Oct 19, 2010
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 the earliest non-provisional application in its chain was filed (this one was filed Feb 27, 2008) | Sep 30, 2024 | High confidence |
| Continuity chain | A reissue: its term follows the original patent's, with the original's term adjustment | follows the original patent | Medium confidence |
| Patent term adjustment | +241 days, the original patent's USPTO patent term adjustment record, which governs a reissue (35 U.S.C. 251). This reissue's own record carries none | May 29, 2025 | Medium confidence |
| Terminal disclaimer cap | Disclaimer on file (approved), reference document not resolved | no cap applied, and none guessed | Medium confidence |
| Patent term extension | None on file | no change | High confidence |
| Fee events | 2 of 3 maintenance fees paid | lapsed Jun 12, 2019 | High confidence |
| Computed term end | The steps above, in order | Jun 12, 2019 | Low 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.