Em Resources LLC

19 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 3 name spellings.

Ending by 2030

Jan 2027

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 Apr 24, 2027
The maintenance fee for Aggregate Materials and Methods of Preparation Thereof (US 11,795,104) comes due Apr 24, 2027. Unpaid by Oct 25, 2027, it lapses early.
1 fee due Oct 7, 2027
The maintenance fee for Recovery and Beneficiation of Pozzolan Deposits for Enhanced Performance in Concrete (US 10,611,684) comes due Oct 7, 2027. Unpaid by Apr 7, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

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.

Patent	Title	Status	Expires	Confidence
US 7,658,796	Cementitious Mixtures and Methods of Use Thereof In force Term ends Jan 13, 2027 · High confidence	In force	Term ends Jan 13, 2027	High confidence
US 7,670,424	Methods for Reclaiming and Beneficiating Fly Ash Particles and Systems Thereof In force Term ends Jan 19, 2027 · High confidence	In force	Term ends Jan 19, 2027	High confidence
US 7,703,403	System and Method for Recomposing Ammonia from Fly Ash In force Term ends Jun 19, 2027 · Medium confidence	In force	Term ends Jun 19, 2027	Medium confidence
US 7,641,878	Fly Ash Beneficiation Systems with Sulfur Removal and Methods Thereof In force Term ends Feb 2, 2028 · High confidence	In force	Term ends Feb 2, 2028	High confidence
US 7,879,926	Method and Composition for Controlling the Viscosity of Latex Compositions That Include Fly Ash In force Term ends Feb 6, 2029 · High confidence	In force	Term ends Feb 6, 2029	High confidence
US 8,617,438	Fly Ash-Based Cementitious Mixture In force Term ends Jun 30, 2031 · High confidence	In force	Term ends Jun 30, 2031	High confidence
US 8,747,549	Fly Ash-Based Cementitious Mixture In force Term ends Jun 30, 2031 · High confidence	In force	Term ends Jun 30, 2031	High confidence
US 9,023,149	Fly Ash-Based Cementitious Mixture In force Term ends Jun 30, 2031 · High confidence	In force	Term ends Jun 30, 2031	High confidence
US 8,617,308	Fly Ash-Based Cementitious Mixture In force Term ends Mar 9, 2032 · High confidence	In force	Term ends Mar 9, 2032	High confidence
US 9,932,457	Composites Formed from an Absorptive Filler and a Polyurethane In force Term ends Apr 12, 2033 · High confidence	In force	Term ends Apr 12, 2033	High confidence

10 of 19 patents shown.

Pro members see all 19.

Pro members: see all 19 patents

Also on record, not counted in the 19: 4 patents in force now held by others · 7 lapsed for an unpaid fee · 12 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.