Sartorius Polyplus

8 patents currently held · Updated Nov 14, 2026

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

Previously recorded as Polyplus Transfection (to 2026)

Ending by 2030

Dec 2026

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 Jan 28, 2027
The maintenance fee for Cationic Oligonucleotides, Automated Methods for Preparing Same and Their Uses (US 9,090,648) comes due Jan 28, 2027. Unpaid by Jul 28, 2027, 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.

Showing 1 to 8 of 8

Patent	Title	Status	Expires	Confidence
US 9,676,798	Cationic Oligonucleotides, Automated Methods for Preparing Same and Their Uses In force Term ends Dec 14, 2026 · High confidence	In force	Term ends Dec 14, 2026	High confidence
US 8,802,640	Oligonucleotides for RNA interference and biological applications thereof In force Term ends Jul 17, 2027 · From the USPTO record	In force	Term ends Jul 17, 2027	From the USPTO record
US 9,090,648	Cationic Oligonucleotides, Automated Methods for Preparing Same and Their Uses In force Ends no later than Dec 17, 2028 · Medium confidence	In force	Ends no later than Dec 17, 2028	Medium confidence
US 8,399,422	Compositions for transfection of oligonucleotides active for gene silencing and their biological and therapeutical applications In force Term ends Mar 24, 2029 · From the USPTO record	In force	Term ends Mar 24, 2029	From the USPTO record
US 8,465,920	Method for Hybridizing Nucleic Acids In force Term ends Jul 7, 2029 · High confidence	In force	Term ends Jul 7, 2029	High confidence
US 12,510,541	Methods for Purification, Detection and Quantification of Residual Pei-Based Transfection Reagents In force Term ends Feb 24, 2043 · High confidence	In force	Term ends Feb 24, 2043	High confidence
US 12,790,304	COMPOSITIONS FOR TRANSFECTING mRNA INTO A CELL AND THEIR APPLICATIONS In force Term ends Oct 23, 2043 · High confidence	In force	Term ends Oct 23, 2043	High confidence
US 12,716,075	Compositions for Transfecting a Nucleic Acid Molecule into a Cell Comprising Benzo-Fused Heterocyclic Compounds Grafted to a Cationic Polymer, and Their Applications In force Term ends Nov 7, 2043 · High confidence	In force	Term ends Nov 7, 2043	High confidence

Also on record, not counted in the 8: 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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