Tersus Environmental LLC

8 patents currently held · Updated Nov 15, 2026

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

Ending by 2030

Jun 2034

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 Oct 12, 2027
The maintenance fee for Bioremediation of soil and groundwater (US 9,309,136) comes due Oct 12, 2027. Unpaid by Apr 12, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

1 of the patents on this record was granted since Aug 17, 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 8 of 8

Patent	Title	Status	Expires	Confidence
US 9,309,136	Bioremediation of soil and groundwater In force (reinstated) Term ends Jun 25, 2034 · From the USPTO record	In force (reinstated)	Term ends Jun 25, 2034	From the USPTO record
US 11,123,779	Method and a Chemical Composition for Accelerated in Situ Biochemical Remediation In force Term ends Feb 18, 2039 · High confidence	In force	Term ends Feb 18, 2039	High confidence
US 12,103,057	Zero-Valent Metal Suspension in Non-Aqueous Phase for Water Remediation In force Term ends Feb 18, 2039 · High confidence	In force	Term ends Feb 18, 2039	High confidence
US 11,491,522	Zero-Valent Metal Suspension in Non-Aqueous Phase for Water Remediation In force Term ends Jan 4, 2040 · High confidence	In force	Term ends Jan 4, 2040	High confidence
US 11,577,231	Enhanced Reduction Bioremediation Method Using In-situ Alcoholysis In force Term ends Dec 24, 2040 · High confidence	In force	Term ends Dec 24, 2040	High confidence
US 12,753,344	Method for Heat Enhanced Reductive Bioremediation In force Term ends Jan 15, 2041 · High confidence	In force	Term ends Jan 15, 2041	High confidence
US 12,421,135	Metal powder mixture as heat source for treating environmental medium In force Term ends Dec 15, 2043 · From the USPTO record	In force	Term ends Dec 15, 2043	From the USPTO record
US 12,522,766	Method and System for In-Situ Remediation Using Surfactant-Free Oil-In Water Emulsion In force Term ends Sep 13, 2044 · High confidence	In force	Term ends Sep 13, 2044	High confidence

Also on record, not counted in the 8: 5 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

Every application published under this name has become a patent.