The Patent Finder

Tankbots, Inc.

6 patents currently held · Updated Nov 14, 2026
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
0
Ending by 2030
Dec 2037
Next term end

When these terms end

Held patents by the year their term ends
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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 May 28, 2027
    The maintenance fee for Methods for Performing Tasks Inherently Safely in a Tank Containing Hazardous Substances (US 11,828,731) comes due May 28, 2027. Unpaid by Nov 29, 2027, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

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

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.

Showing 1 to 6 of 6

PatentTitleStatus Expires Confidence
US 11,181,438Methods for performing tasks in a tank containing hazardous substances
In force
 · From the USPTO record
In forceFrom the USPTO record
US 11,828,731Methods for Performing Tasks Inherently Safely in a Tank Containing Hazardous Substances
In force
 · High confidence
In forceHigh confidence
US 11,604,180Voltage Differential Reduction Methods Used While Retrieving a Mobile Platform from a Tank Containing a Hazardous, Non-Conductive Substance
In force
 · Medium confidence
In forceMedium confidence
US 11,536,705Methods for controlling charge accumulation while operating a mobile platform immersed in a hazardous, non-conductive substance
In force
 · From the USPTO record
In forceFrom the USPTO record
US 11,415,566Methods utilizing a tethered buoyant body to retrieve a mobile platform from a tank containing a hazardous substance
In force
 · From the USPTO record
In forceFrom the USPTO record
US 12,145,177Method for retrieving a mobile platform from a tank having energetic substances
In force
 · From the USPTO record
In forceFrom the USPTO record

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

Every application published under this name has become a patent.

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