Relational Database Management System (RDBMS) Employing Multi-Dimensional Database (MDDB) for Servicing Query Statements Through One or More Client Machines

US 8,473,450 Term ended

Overview Sources & methods

Term ended Feb 28, 2020 · Medium confidence

Computed 20-year base term

Why Medium: A parent in the chain could not be resolved.

USPTO later recorded it as expired for non-payment on Aug 2, 2021.

Held by Mec Management, LLC

Filed Jun 4, 2009 as application 12/455,665 · Granted Jun 25, 2013

Base term plus 13 days of patent term adjustment (USPTO delay) · capped by a resolved terminal disclaimer

Today

20 years from filing

Term ended Feb 28, 2020

2000 2026

Clock starts
Feb 28, 2000

Term ended
Feb 28, 2020

Granted
Jun 25, 2013

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

Days of term adjustment

Read from the USPTO patent term adjustment record, not recalculated here.

Capped

Terminal disclaimer

Resolved from the filed document, referencing US 8,195,602.

1 of 1

Maintenance fees paid

One maintenance fee can end this term early, the one due 3.5 years from grant; the next one's grace period runs past the term end. This counts it if the record shows it paid.

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 Feb 28, 2000, when the earliest non-provisional application in its chain was filed (this one was filed Jun 4, 2009); a parent in its chain could not be resolved (the next row)	Feb 28, 2020	High confidence
Continuity chain	A parent in the chain could not be resolved	dated from this application's own claim	Medium confidence
Patent term adjustment	+13 days, USPTO patent term adjustment record	Mar 12, 2020	High confidence
Terminal disclaimer cap	Disclaimer resolved from the filed document (refs US 8,195,602)	capped to Feb 28, 2020	High confidence
Patent term extension	None on file	no change	High confidence
Fee events	1 of 1 maintenance fees paid	term ended	High confidence
USPTO status record	Recorded as expired for non-payment on Aug 2, 2021, after the term ended	no change	High confidence
Computed term end	The steps above, in order	Feb 28, 2020	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.

Relational Database Management System (RDBMS) Employing Multi-Dimensional Database (MDDB) for Servicing Query Statements Through One or More Client Machines

Term ended Feb 28, 2020 · Medium confidence

20-year base term ended Feb 28, 2020

How we calculated this date

Sources