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7 patents currently held · Updated Nov 14, 2026

Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.

Ending by 2030

Jan 2028

Next term end

When these terms end

5 yrs10 yrs20 yrs

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 Mar 10, 2027
The maintenance fee for Impeller-structured system for rotor-rotor-type dispersion and emulsification apparatus (US 10,406,491) comes due Mar 10, 2027. Unpaid by Sep 10, 2027, it lapses early.
1 fee due Apr 24, 2027
The maintenance fee for Process for producing potassium chloride granulates (US 11,795,060) comes due Apr 24, 2027. Unpaid by Oct 25, 2027, it lapses early.
2 fees due May 14, 2027

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Recent changes

1 of the patents on this record was 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.

Showing 1 to 7 of 7

Patent	Title	Status	Expires	Confidence
US 7,553,462	Method for the production of Mg (OH)2 nanoparticles In force Term ends Jan 29, 2028 · From the USPTO record	In force	Term ends Jan 29, 2028	From the USPTO record
US 10,118,183	Process for the selective floatation of kainite from mineral mixtures using sulfated fatty acids as the collector reagent In force Term ends Dec 1, 2035 · From the USPTO record	In force	Term ends Dec 1, 2035	From the USPTO record
US 10,406,491	Impeller-structured system for rotor-rotor-type dispersion and emulsification apparatus In force Term ends Jul 4, 2036 · From the USPTO record	In force	Term ends Jul 4, 2036	From the USPTO record
US 11,795,060	Process for producing potassium chloride granulates In force Ends no later than Aug 22, 2037 · From the USPTO record	In force	Ends no later than Aug 22, 2037	From the USPTO record
US 11,814,297	Method for producing potassium chloride granular material In force Ends no later than Aug 22, 2037 · From the USPTO record	In force	Ends no later than Aug 22, 2037	From the USPTO record
US 11,814,298	Method for producing potassium chloride granular materials In force Term ends Aug 22, 2037 · From the USPTO record	In force	Term ends Aug 22, 2037	From the USPTO record
US 12,709,546	Method for Producing Sulphur-Containing Potash Granules In force Term ends Aug 5, 2043 · High confidence	In force	Term ends Aug 5, 2043	High confidence

Also on record, not counted in the 7: 8 lapsed for an unpaid fee · 3 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.

14 no status recorded

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