Paragraf Limited

22 patents currently held · Updated Nov 15, 2026

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

Recorded under 2 name spellings.

Previously recorded as Cardea Bio, Inc. (to 2024)

Ending by 2030

Mar 2035

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 May 28, 2027
The maintenance fee for Graphene Transistor and Method of Manufacturing a Graphene Transistor (US 11,830,925) comes due May 28, 2027. Unpaid by Nov 29, 2027, it lapses early.
2 fees due Jun 5 to 19, 2027 · next Jun 5
2 fees due Sep 5 to 17, 2027 · next Sep 5

Which patents, and when each one lapses · Pro

Recent changes

2 of the patents on this record were 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.

Patent	Title	Status	Expires	Confidence
US 11,921,112	Chemically-Sensitive Field Effect Transistors, Systems, and Methods for Manufacturing and Using the Same In force Term ends Mar 9, 2035 · Medium confidence	In force	Term ends Mar 9, 2035	Medium confidence
US 11,456,172	Method of producing a two-dimensional material In force Ends no later than Jan 7, 2036 · From the USPTO record	In force	Ends no later than Jan 7, 2036	From the USPTO record
US 11,848,206	Method of producing a two-dimensional material In force Ends no later than Jan 7, 2036 · From the USPTO record	In force	Ends no later than Jan 7, 2036	From the USPTO record
US 10,593,546	Method of producing a two-dimensional material In force Term ends Feb 13, 2036 · From the USPTO record	In force	Term ends Feb 13, 2036	From the USPTO record
US 11,217,447	Method of producing a two-dimensional material In force Term ends Mar 25, 2036 · From the USPTO record	In force	Term ends Mar 25, 2036	From the USPTO record
US 11,643,719	A Method of Making Graphene Layer Structures In force Term ends Jan 10, 2039 · High confidence	In force	Term ends Jan 10, 2039	High confidence
US 11,472,708	Method of making graphene structures and devices In force Term ends Apr 18, 2039 · From the USPTO record	In force	Term ends Apr 18, 2039	From the USPTO record
US 12,002,861	Method of forming conductive contacts on graphene In force Term ends May 27, 2041 · From the USPTO record	In force	Term ends May 27, 2041	From the USPTO record
US 12,084,758	Method of making graphene structures and devices In force Term ends Aug 21, 2041 · From the USPTO record	In force	Term ends Aug 21, 2041	From the USPTO record
US 12,164,007	Method and apparatus for field mapping a cell under load In force Term ends Aug 21, 2041 · From the USPTO record	In force	Term ends Aug 21, 2041	From the USPTO record

10 of 22 patents shown.

Pro members see all 22.

Pro members: see all 22 patents

Also on record, not counted in the 22: 1 lapsed for an unpaid fee. 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.

10 pending · 3 abandoned · 7 no status recorded

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