The Patent Finder

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40 patents currently held · Updated Nov 14, 2026
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.

Recorded under 6 name spellings.

4
Ending by 2030
Jun 2027
Next term end

When these terms end

Held patents by the year their term ends
20262027202820292030203120322033203420352036203720382039204020412042204320442045

Fee deadlines

Maintenance fees fall due 3.5, 7.5 and 11.5 years after grant. A missed fee ends a patent at the end of the six month grace period that follows, not on the due date.
  • 2 fees due Dec 11 to 23, 2026 · next Dec 11
  • 1 fee due Mar 15, 2027
    The maintenance fee for Internal combustion engine (US 9,133,766) comes due Mar 15, 2027. Unpaid by Sep 15, 2027, it lapses early.
  • 2 fees due Apr 17 to 30, 2027 · next Apr 17
  • 2 fees due May 7 to 19, 2027 · next May 7
  • 1 fee due Jun 10, 2027
    The maintenance fee for Exhaust Gas After-Treatment Unit for an Internal Combustion Engine and Procedure for Using a Drive Mechanism with Such an Exhaust Gas After-Treatment Unit (US 10,502,107) comes due Jun 10, 2027. Unpaid by Dec 10, 2027, it lapses early.
  • 1 fee due Sep 12, 2027
    The maintenance fee for Oil return valve for a crankcase ventilation system (US 11,927,119) comes due Sep 12, 2027. Unpaid by Mar 13, 2028, it lapses early.
  • 2 fees due Oct 14 to 30, 2027 · next Oct 14

Which patents, and when each one lapses · Pro

Recent changes

  • 1 of the patents on this record was granted since Aug 16, 2026
  • 2 terms have ended since Aug 16, 2026

Patents held now

Soonest term end first. Each date below is computed on that patent's own page, which shows the rule, the adjustments and the fee history it was derived from.
PatentTitleStatus Expires Confidence
US 7,827,958Gas Exchange Valve Actuating Device
In force
 · High confidence
In forceHigh confidence
US 7,832,384Exhaust-gas recirculation in an air-cooled internal combustion engine
In force
 · From the USPTO record
In forceFrom the USPTO record
US 8,191,413Method for Determining the Nitrogen Dioxide Concentration in Exhaust Gases
In force
 · High confidence
In forceHigh confidence
US 8,230,837Valve Drive Train Actuating Device
In force
 · High confidence
In forceHigh confidence
US 9,133,766Internal combustion engine
In force
 · From the USPTO record
In forceFrom the USPTO record
US 9,737,852Catalyst Component of a Motor Vehicle Exhaust Gas Cleaning System and Use of a Catalyst Component
In force
 · High confidence
In forceHigh confidence
US 9,695,775Internal combustion engine having a spacer sleeve with a centering device
In force
 · From the USPTO record
In forceFrom the USPTO record
US 9,678,049Method for Processing Measured Values from a Nitrogen Oxide Sensor
In force
 · High confidence
In forceHigh confidence
US 9,821,272Device and method for the purification of diesel engine exhaust gases
In force
 · From the USPTO record
In forceFrom the USPTO record
US 9,061,245Method for reducing nitrogen oxides in diesel-engine exhaust gases and exhaust gas aftertreatment system for carrying out the method
In force
 · From the USPTO record
In forceFrom the USPTO record
10 of 40 patents shown.
Pro members see all 40.
Pro members: see all 40 patents
Also on record, not counted in the 40: 4 patents in force now held by others · 29 lapsed for an unpaid fee · 39 ended at full term. List them

Sources and methods

Compiled from the USPTO record, grants, published applications and recorded assignments, not yet reviewed by hand. How this record was built
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.

Published applications

US patent applications published under this name that have not become patents. An application is published about eighteen months after its earliest filing; one that has not been published is in no public record.

5 pending · 11 no status recorded

List them

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