The Patent Finder
QS

Qlogic System Interconnect Group, Inc.

First filing 2004
OverviewNotableFeesChangesPatent listSources & methods

0 patents currently held, every record listed here

4 more in force are now held by other companies
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.

This portfolio holds none of the 4 US patents in force on its record. from the record

Of the 4 now held by other companies, 3 name Tahoe Research Ltd. as their current owner, and 1 more name another party. Each row says which.

Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
0
Ending by 2030
none
Next term end

When these terms end

Each bar runs from grant to computed term end. 2009 to 2028.
US 7,561,567 Protocol to Implement Token Id Mechanism for Network Data Transfer May 23, 2027
US 7,889,749 Cut-Through Decode and Reliability Jun 5, 2027
US 7,804,862 Token Id Mechanism for Network Data Transfer Aug 5, 2027
US 7,903,557 Multipathing Using Multiple Endpoint Addresses for Load Balancing in a Network Aug 8, 2028
20132017202120252028
Every computed term in this portfolio is shown above.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

Notable patents

Ranked by citations and family size, against patents of the same kind granted the same year. How we rank
None of the currently held patents qualifies as notable.

Formerly held, still cited

Notable
The most cited patent in this portfolio, cited by 51 later US patents, top 25% of utility patents granted in 2010 in our data. Protection runs to 2027.
Ends Aug 2027 · High confidence
Also notable
Renewed at every maintenance window since the 2009 grant; no more fees are due before its term ends in 2027.
Ends May 2027 · High confidence
Also notable
Renewed at every maintenance window since the 2011 grant; no more fees are due before its term ends in 2028.
Ends Aug 2028 · High confidence

Fee deadlines

No maintenance fee falls due on this company's record before Nov 10, 2027.

Recent changes

Nothing was recorded against this company's patents in the last 90 days.

Patents held now

Soonest term end first.
Also on record: 4 patents in force now held by others · 5 patents ended. List them

Sources and methods

Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built
Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
The Patent Finder CompaniesExpirationsCalculatorWatchlistPricing MethodologyCorrectionsLegalPrivacysupport@thepatentfinder.com Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited