Video Telephony Service Method in Mobile Communication Network
US 7,898,564 Surrendered on reissueSurrendered on reissue Nov 4, 2014 · Low confidence
20-year base term ended Sep 27, 2025
Surrendered on reissue Nov 4, 2014 · its term and maintenance fees continue in US RE45,228.
Sep 27, 2005
Nov 4, 2014
Mar 1, 2011
Dec 27, 2026
How we calculated this date
| Step | Input | Date after this step | Confidence |
|---|---|---|---|
| Base term, 20 years from filing | Clock starts Sep 27, 2005, when the earliest non-provisional application in its chain was filed (this one was filed Jun 2, 2008) | Sep 27, 2025 | High confidence |
| Continuity chain | Every parent in the chain resolved | no change | High confidence |
| Patent term adjustment | +456 days, USPTO patent term adjustment record | Dec 27, 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 | No fee event states this; the fee state is read from the payments the fee record holds; the fee record shows no payment for this window, and USPTO's status still reads "Patented Case" | no change | Low confidence |
| Reissue | US RE45,228 issued Nov 4, 2014, and this patent's term continues in it (35 U.S.C. 251, 252) | surrendered Nov 4, 2014 | High confidence |
| Surrendered on reissue | The steps above, in order | Nov 4, 2014 | 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.