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PP

Phio Pharmaceuticals Corp.

First filing 2005
OverviewNotableFeesChangesFamiliesPatent listSources & methods

26 patents currently held

1 more in force is now held by another company
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.

The next term ends in Dec 2027. from the record

Free plan: 3 watched companies. Pro: unlimited.
Alerts on its grants, lapses and transfers.
10
Ending by 2030
Dec 2027
Next term end
15
Patent families

When these terms end

Held patents by the year their term ends
20262027202820292030203120322033203420352036203720382039204020412042204320442045
notable patents fee due within 90 days all others Updated Nov 15, 2026 · includes USPTO assignment & status data published Nov 15, 2026 and grant & fee data published Nov 10, 2026 (weekly) · how we know
Notable: the highest-ranked patents in this portfolio by citations and family size. Fee due within 90 days: a maintenance fee is due within 90 days of when this page was computed and not yet paid.

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 Dec 6, 2026
    The maintenance fee for RNA Duplexes with Single Stranded Phosphorothioate Nucleotide Regions for Additional Functionality (US 11,667,915) comes due Dec 6, 2026. Unpaid by Jun 7, 2027, it lapses early.
  • 2 fees due Jan 7 to 14, 2027 · next Jan 7
  • 1 fee due Feb 4, 2027
    The maintenance fee for RNA Interference in Ocular Indications (US 9,095,504) comes due Feb 4, 2027. Unpaid by Aug 4, 2027, it lapses early.
  • 2 fees due May 3 to 19, 2027 · next May 3
  • 1 fee due Sep 12, 2027
    The maintenance fee for Methods for Treating Aging and Skin Disorders Using Nucleic Acids Targeting Tyr or MMP1 (US 11,926,828) comes due Sep 12, 2027. Unpaid by Mar 13, 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
  • 1 term has ended since Aug 17, 2026

What they patent

The 5 largest of its 15 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Patents held now

Soonest term end first.
PatentTitleStatusExpiresConfidence
US 7,872,118Sirna and Methods of Manufacture
In force
 · High confidence
In forceHigh confidence
US 10,131,904Modified Rnai Polynucleotides and Uses Thereof
In force
 · Medium confidence
In forceMedium confidence
US 9,175,289Reduced Size Self-Delivering Rnai Compounds
In force
 · Medium confidence
In forceMedium confidence
US 10,774,330Reduced Size Self-Delivering Rnai Compounds
In force
 · Medium confidence
In forceMedium confidence
US 10,167,471Inhibition of PCSK9 Through Rnai
In force
 · High confidence
In forceHigh confidence
US 9,745,574RNA Duplexes with Single Stranded Phosphorothioate Nucleotide Regions for Additional Functionality
In force
 · High confidence
In forceHigh confidence
US 10,479,992RNA Duplexes with Single Stranded Phosphorothioate Nucleotide Regions for Additional Functionality
In force
 · Medium confidence
In forceMedium confidence
US 11,667,915RNA Duplexes with Single Stranded Phosphorothioate Nucleotide Regions for Additional Functionality
In force
 · Medium confidence
In forceMedium confidence
US 8,796,443Reduced Size Self-Delivering Rnai Compounds
In force
 · Medium confidence
In forceMedium confidence
US 9,074,211Inhibition of MAP4K4 Through Rnai
In force
 · High confidence
In forceHigh confidence
10 of 26 patents shown.
Pro members see all 26.
Pro members: see all 26 patents
Also on record, not counted in the 26: 1 patent in force now held by others · 19 patents ended · 6 applications pending · 14 applications abandoned. List them

Sources and methods

Compiled from USPTO application file histories, grants and recorded assignments, with the company's own names reviewed by hand. How this record was built
Portfolio grouped automatically from ownership conveyances to the names matched to this company, usually every name that begins with its own, so it counts patents an affiliate holds; each list row names the holder of record. Security interests are excluded and ambiguous records are not reviewed by hand.
Fee due within 90 days marks a patent with a maintenance fee due within 90 days of the date this page was computed and not yet recorded paid, so it can end earlier than the bar shows. A fee left unpaid ends the patent at the close of the six month grace period that follows its due date, not on the due date itself. It is not a prediction that the fee will be missed.
Computed patent terms end on the dates shown. Related patents and pending applications may cover overlapping subject matter.
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