Cellectis

87 patents currently held · Updated Nov 14, 2026

11 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.

Ending by 2030

Dec 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 Nov 28, 2026
The maintenance fee for Method to Overcome DNA Chemical Modifications Sensitivity of Engineered Tale DNA Binding Domains (US 10,301,614) comes due Nov 28, 2026. Unpaid by May 28, 2027, it lapses early.
3 fees due Dec 11 to 27, 2026 · next Dec 11
4 fees due Jan 4 to 30, 2027 · next Jan 4
1 fee due Feb 13, 2027
The maintenance fee for Methods for Modulating Tal Specificity (US 10,378,007) comes due Feb 13, 2027. Unpaid by Aug 13, 2027, it lapses early.
1 fee due Mar 26, 2027
The maintenance fee for New Sequence Specific Reagents Targeting CCR5 in Primary Hematopoietic Cells (US 11,767,512) comes due Mar 26, 2027. Unpaid by Sep 27, 2027, it lapses early.
1 fee due Apr 1, 2027
The maintenance fee for Use of Pre T Alpha or Functional Variant Thereof for Expanding TCR Alpha Deficient T Cells (US 10,426,795) comes due Apr 1, 2027. Unpaid by Oct 1, 2027, it lapses early.
2 fees due May 12 to 21, 2027 · next May 12
3 fees due Jun 17 to 30, 2027 · next Jun 17
2 fees due Jul 16 to 28, 2027 · next Jul 16
3 fees due Aug 4 to 20, 2027 · next Aug 4
3 fees due Sep 1 to 10, 2027 · next Sep 1
2 fees due Oct 16 to 19, 2027 · next Oct 16

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.

Patent	Title	Status	Expires	Confidence
US 8,979,818	Method and apparatus for the delivery of polynucleotide vaccines to mammalian skin In force Term ends Dec 10, 2028 · High confidence	In force	Term ends Dec 10, 2028	High confidence
US 8,476,072	Meganuclease Recombination System In force Term ends Oct 23, 2029 · High confidence	In force	Term ends Oct 23, 2029	High confidence
US 9,365,864	Meganuclease Recombination System In force Term ends Oct 23, 2029 · High confidence	In force	Term ends Oct 23, 2029	High confidence
US 9,273,296	Meganuclease Variants Cleaving a DNA Target Sequence from a Glutamine Synthetase Gene and Uses Thereof In force Term ends Mar 13, 2031 · High confidence	In force	Term ends Mar 13, 2031	High confidence
US 11,136,566	Tale-Protein Scaffolds and Uses Thereof In force Term ends Apr 6, 2032 · High confidence	In force	Term ends Apr 6, 2032	High confidence
US 11,198,856	Method for the Generation of Compact Tale-Nucleases and Uses Thereof In force Term ends Aug 12, 2032 · High confidence	In force	Term ends Aug 12, 2032	High confidence
US 10,342,829	Multi-Chain Chimeric Antigen Receptor and Uses Thereof In force Term ends May 13, 2033 · Medium confidence	In force	Term ends May 13, 2033	Medium confidence
US 10,517,896	Use of Pre T Alpha or Functional Variant Thereof for Expanding TCR Alpha Deficient T Cells In force Term ends May 13, 2033 · Low confidence	In force	Term ends May 13, 2033	Low confidence
US 10,874,693	CD19 Specific Chimeric Antigen Receptor and Uses Thereof In force Term ends May 13, 2033 · Medium confidence	In force	Term ends May 13, 2033	Medium confidence
US 11,007,224	CD19 Specific Chimeric Antigen Receptor and Uses Thereof In force Term ends May 13, 2033 · Low confidence	In force	Term ends May 13, 2033	Low confidence

10 of 87 patents shown.

Pro members see all 87.

Pro members: see all 87 patents

Also on record, not counted in the 87: 11 patents in force now held by others · 15 lapsed for an unpaid fee · 2 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.

12 pending · 91 abandoned

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