Tooth Preparation Guide Device and Method of Preparing Tooth for Dental Prosthesis

US 8,651,860 Surrendered on reissue

Surrendered on reissue May 1, 2018 · High confidence

Computed 20-year base term

Surrendered on reissue May 1, 2018 · its term and maintenance fees continue in US RE46,813 and US RE48,318 and US RE49,487 and US RE51,102.

Held by Winverts, Inc.

Filed May 3, 2013 as application 13/883,565 · Granted Feb 18, 2014

Base term, 20 years from filing

Today

Surrendered May 1, 2018

2011 2031

Clock starts
Nov 17, 2011

No longer in force
May 1, 2018

Granted
Feb 18, 2014

Term would have run to
Nov 17, 2031

base term after the term ends fee events Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know

None

Term adjustment

No prosecution delay on this record.

None

Terminal disclaimer

No disclaimer on this record.

1 of 3

Maintenance fees paid

Fees paid on this patent before its reissue. Those after fall due on the reissue, which carries the term on.

How we calculated this date

One row per rule, each showing its own input and what it did to the date. A step we could not verify says so instead of resolving itself.

Step	Input	Date after this step	Confidence
Base term, 20 years from filing	Clock starts Nov 17, 2011, when the earliest non-provisional application in its chain was filed (this one was filed May 3, 2013)	Nov 17, 2031	High confidence
Continuity chain	Every parent in the chain resolved	no change	High confidence
Patent term adjustment	None on file	no change	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	3 of 3 maintenance fees paid	no change	High confidence
Reissue	US RE46,813 and US RE48,318 and US RE49,487 and US RE51,102 issued May 1, 2018, and this patent's term continues in it (35 U.S.C. 251, 252)	surrendered May 1, 2018	High confidence
Surrendered on reissue	The steps above, in order	May 1, 2018	High 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.

Tooth Preparation Guide Device and Method of Preparing Tooth for Dental Prosthesis

Surrendered on reissue May 1, 2018 · High confidence

20-year base term ends Nov 17, 2031

How we calculated this date

Sources