The Patent Finder

Avantech, Inc.

14 patents currently held · Updated Nov 14, 2026
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
3
Ending by 2030
Dec 2026
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.
  • 1 fee due Jun 22, 2027
    The maintenance fee for Wastewater Treatment and Radioactive Material Disposal Container (US 9,218,897) comes due Jun 22, 2027. Unpaid by Dec 22, 2027, it lapses early.
  • 1 fee due Aug 16, 2027
    The maintenance fee for High Radioactivity Filter (US 9,263,159) comes due Aug 16, 2027. Unpaid by Feb 16, 2028, it lapses early.
  • 2 fees due Sep 3 to 15, 2027 · next Sep 3
  • 1 fee due Oct 23, 2027
    The maintenance fee for Lined hazardous materials container (US 11,967,438) comes due Oct 23, 2027. Unpaid by Apr 24, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

  • 2 of the patents on this record were granted 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 7,708,890Method of Rendering a Radioactive and Aqueous Heat Transfer Liquid in a Nuclear Reactor to a Reduced Radwaste Quantitative State and Returning the Remaining Waste Water Volumes to an Environmental Release Point for Liquid Effluents
In force
 · High confidence
In forceHigh confidence
US 7,645,387Method of Utilizing Ion Exchange Resin and Reverse Osmosis to Reduce Environmental Discharges and Improve Effluent Quality to Permit Recycle of Aqueous or Radwaste Fluid
In force
 · High confidence
In forceHigh confidence
US 8,114,004Method and Device for Evaporate/Reverse Osmosis Concentrate and Other Liquid Solidification
In force
 · High confidence
In forceHigh confidence
US 9,283,418Concentrate Treatment System
In force
 · Low confidence
In forceLow confidence
US 10,717,660Vessel for removing radionuclides from a liquid
In force
 · From the USPTO record
In forceFrom the USPTO record
US 9,218,897Wastewater Treatment and Radioactive Material Disposal Container
In force
 · High confidence
In forceHigh confidence
US 9,263,159High Radioactivity Filter
In force
 · High confidence
In forceHigh confidence
US 9,896,351Method for Removal of Radionuclides in Liquids
In force
 · High confidence
In forceHigh confidence
US 9,896,352Apparatus for Removal of Radionuclides in Liquids
In force
 · High confidence
In forceHigh confidence
US 10,580,542Concentrate Treatment System
In force
 · Medium confidence
In forceMedium confidence
10 of 14 patents shown.
Pro members see all 14.
Pro members: see all 14 patents
Also on record, not counted in the 14: 1 lapsed for an unpaid fee · 1 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.
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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 abandoned · 2 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