The Patent Finder

Ysi, Inc.

27 patents currently held · Updated Nov 14, 2026
Held is read from USPTO's recorded assignments; a transfer never recorded there does not appear.
9
Ending by 2030
Sep 2027
Next term end

When these terms end

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 23, 2026
    The maintenance fee for Multi excitation-multi emission fluorometer for multiparameter water quality monitoring (US 11,656,180) comes due Nov 23, 2026. Unpaid by May 24, 2027, it lapses early.
  • 2 fees due Apr 8 to 27, 2027 · next Apr 8
  • 1 fee due May 10, 2027
    The maintenance fee for Device for the detector of fouling on optical surfaces of a nephelometric turbidimeter submerged in a liquid (US 9,182,344) comes due May 10, 2027. Unpaid by Nov 10, 2027, it lapses early.
  • 1 fee due Jun 1, 2027
    The maintenance fee for Replaceable probe head (US 9,200,929) comes due Jun 1, 2027. Unpaid by Dec 1, 2027, it lapses early.
  • 1 fee due Jul 2, 2027
    The maintenance fee for Extended Solid Angle Turbidity Sensor (US 11,860,096) comes due Jul 2, 2027. Unpaid by Jan 3, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

Nothing was recorded against this company's patents in the last 90 days.

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.
PatentTitleStatus Expires Confidence
US 8,137,641Microfluidic module including an adhesiveless self-bonding rebondable polyimide
In force
 · From the USPTO record
In forceFrom the USPTO record
US 7,523,658Method for measuring river discharge in the presence of moving bottom
In force
 · From the USPTO record
In forceFrom the USPTO record
US 7,659,980Nephelometric turbidity sensor device
In force
 · From the USPTO record
In forceFrom the USPTO record
US 7,663,751Nephelometer instrument for measuring turbidity of water
In force
 · From the USPTO record
In forceFrom the USPTO record
US 8,082,810Microfluidic elastic micro-aliquotter
In force
 · From the USPTO record
In forceFrom the USPTO record
US 8,780,672Multi-frequency, multi-beam acoustic doppler system with concurrent processing
In force
 · From the USPTO record
In forceFrom the USPTO record
US 8,411,530Multi-frequency, multi-beam acoustic doppler system
In force
 · From the USPTO record
In forceFrom the USPTO record
US 9,200,929Replaceable probe head
In force
 · From the USPTO record
In forceFrom the USPTO record
US 8,125,849Integrated multi-beam acoustic doppler discharge measurement system
In force
 · From the USPTO record
In forceFrom the USPTO record
US 8,272,262Underwater sensor apparatus
In force
 · From the USPTO record
In forceFrom the USPTO record
10 of 27 patents shown.
Pro members see all 27.
Pro members: see all 27 patents
Also on record, not counted in the 27: 26 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.

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.

1 abandoned · 3 no status recorded

List them

The Patent Finder CompaniesExpirationsCalculatorWatchlistPricing MethodologyCorrectionsLegalPrivacysupport@thepatentfinder.com Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 2026 and grant & fee data published Nov 10, 2026 (weekly) Part of 137 Finder · © 2026 137 Finder LLC · Sources cited