Smithsonian Institution

13 patents currently held · Updated Nov 14, 2026

2 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 4 name spellings.

Ending by 2030

Sep 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 Dec 6, 2026
The maintenance fee for Gas-liquid falling film equilibration system and methods of use (US 11,668,630) comes due Dec 6, 2026. Unpaid by Jun 7, 2027, it lapses early.
1 fee due Aug 20, 2027
The maintenance fee for System and method for a replacement touchless button (US 11,908,637) comes due Aug 20, 2027. Unpaid by Feb 22, 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 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 8,129,418	Macrocyclic compounds and methods of treatment In force Term ends Sep 9, 2028 · From the USPTO record	In force	Term ends Sep 9, 2028	From the USPTO record
US 10,010,569	Seaweed Extracts, Unsaturated Fatty Acids, and Methods of Treatment In force Term ends Apr 20, 2034 · High confidence	In force	Term ends Apr 20, 2034	High confidence
US 9,730,970	Seaweed Extracts, Unsaturated Aldehydes, and Methods of Treatment In force Term ends May 5, 2034 · High confidence	In force	Term ends May 5, 2034	High confidence
US 9,970,915	Systems and methods for rapid measurement of carbon dioxide in water In force Term ends Oct 20, 2034 · From the USPTO record	In force	Term ends Oct 20, 2034	From the USPTO record
US 11,358,989	Apratyramide therapeutic agents and methods of treatment In force Term ends Nov 21, 2038 · From the USPTO record	In force	Term ends Nov 21, 2038	From the USPTO record
US 11,333,589	Gas-liquid falling film equilibration system and methods of use In force Term ends Mar 21, 2039 · From the USPTO record	In force	Term ends Mar 21, 2039	From the USPTO record
US 11,668,630	Gas-liquid falling film equilibration system and methods of use In force Term ends Mar 21, 2039 · From the USPTO record	In force	Term ends Mar 21, 2039	From the USPTO record
US D1,055,317	Label rail assembly In force Term ends Dec 24, 2039 · From the USPTO record	In force	Term ends Dec 24, 2039	From the USPTO record
US 11,476,105	Concentric Permeation System for Transfer of Neutral Gaseous Material In force Term ends Mar 19, 2041 · High confidence	In force	Term ends Mar 19, 2041	High confidence
US 11,908,637	System and method for a replacement touchless button In force Term ends Apr 25, 2042 · From the USPTO record	In force	Term ends Apr 25, 2042	From the USPTO record

10 of 13 patents shown.

Pro members see all 13.

Pro members: see all 13 patents

Also on record, not counted in the 13: 2 patents in force now held by others · 4 lapsed for an unpaid fee · 4 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.

2 pending · 1 abandoned · 1 no status recorded

List them