67 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 2028. from the record

Free plan: 3 watched companies. Pro: unlimited.

Alerts on its grants, lapses and transfers.

Ending by 2030

Dec 2028

Next term end

Patent families

When these terms end

5 yrs10 yrs20 yrs

Held patents by the year their term ends

202620272028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045

notable patents fee due within 90 days all others Updated Nov 14, 2026 · includes USPTO assignment & status data published Nov 14, 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.

Notable patents

Ranked by citations and family size, against patents of the same kind granted the same year. How we rank

Notable

Optical flow cell assembly incorporating a replaceable transparent flow cell US 10,466,173

Cited by 11 later US patents, top 25% of utility patents granted in 2019 in our data. Protection runs to 2037.

Ends Oct 2037 · High confidence Also notable

Apparatus to Measure Multiple Signals from a Liquid Sample US 10,908,054

Granted 2021. Computed term ends 2036.

Ends Sep 2036 · High confidence Also notable

Measuring Light Scattering of a Sample US 11,852,584

The newest of the three, granted 2023. It anchors the portfolio to 2041, later than anything else here.

Ends Oct 2041 · High confidence

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.

3 fees due Dec 13 to 27, 2026 · next Dec 13
1 fee due Jan 25, 2027
The maintenance fee for Temperature Uniformity and Suppressing Well Plate Warping in High Throughput Measurements (US 11,708,551) comes due Jan 25, 2027. Unpaid by Jul 26, 2027, it lapses early.
2 fees due Feb 1 to 8, 2027 · next Feb 1
4 fees due Mar 10 to 29, 2027 · next Mar 10
1 fee due Apr 3, 2027
The maintenance fee for Corrosion resistant electrodes (US 11,774,404) comes due Apr 3, 2027. Unpaid by Oct 4, 2027, it lapses early.
2 fees due May 5 to 12, 2027 · next May 5
1 fee due Jun 26, 2027
The maintenance fee for Measuring Light Scattering of a Sample (US 11,852,584) comes due Jun 26, 2027. Unpaid by Dec 27, 2027, it lapses early.
1 fee due Jul 7, 2027
The maintenance fee for Method for the fabrication of corrosion resistant electrodes (US 10,527,583) comes due Jul 7, 2027. Unpaid by Jan 7, 2028, it lapses early.
2 fees due Aug 6, 2027
1 fee due Sep 1, 2027
The maintenance fee for Cuvette for Light Scattering Measurements Incorporating Evaporation Inhibition Means (US 9,274,044) comes due Sep 1, 2027. Unpaid by Mar 1, 2028, it lapses early.
3 fees due Oct 21 to 30, 2027 · next Oct 21
1 fee due Nov 10, 2027
The maintenance fee for Bubble suppressing system for optical measurement cells (US 9,335,250) comes due Nov 10, 2027. Unpaid by May 10, 2028, it lapses early.

Which patents, and when each one lapses · Pro

Recent changes

4 of the patents on this record were granted since Aug 16, 2026

What they patent

The 5 largest of its 45 families, grouped by real patent family and labeled by the earliest filing in each. No technology classification is inferred from titles.

Method and apparatus to mitigate evaporation in high throughput measurements	4 in force	to Mar 2038
Measuring Light Scattering of a Sample	3 in force	to Oct 2041
Optical flow cell assembly incorporating a replaceable transparent flow cell	3 in force	to Dec 2037
High throughput method and apparatus for measuring multiple optical properties of a liquid sample	3 in force	to May 2037
Method and Apparatus to Measure Multiple Signals from a Liquid Sample	3 in force	to Sep 2036

Patents held now

Soonest term end first.

Patent	Title	Status	Expires	Confidence
US 7,813,882	Method for Determining Average Properties of Molecules in Solution In force Term ends Dec 6, 2028 · High confidence	In force	Term ends Dec 6, 2028	High confidence
US 7,982,875	Method and Apparatus for Measuring the Scattered Light Signals from a Liquid Sample In force Term ends Dec 2, 2029 · High confidence	In force	Term ends Dec 2, 2029	High confidence
US 8,525,991	Method to Measure Particle Mobility in Solution with Scattered and Unscattered Light In force Term ends May 18, 2030 · High confidence	In force	Term ends May 18, 2030	High confidence
US 8,163,182	Compartmentalized Field Flow Fractionation In force Term ends May 28, 2030 · High confidence	In force	Term ends May 28, 2030	High confidence
US 8,195,405	Method for Characterizing Reversible Association of Macromolecules at High Concentration In force Term ends Sep 8, 2030 · High confidence	In force	Term ends Sep 8, 2030	High confidence
US 9,459,207	Method of Characterizing Interactions and Screening for Effectors In force Term ends Feb 25, 2031 · High confidence	In force	Term ends Feb 25, 2031	High confidence
US 8,441,638	Apparatus to Measure Particle Mobility in Solution with Scattered and Unscattered Light In force Term ends Jun 24, 2031 · High confidence	In force	Term ends Jun 24, 2031	High confidence
US 9,335,250	Bubble suppressing system for optical measurement cells In force Term ends Aug 23, 2032 · High confidence	In force	Term ends Aug 23, 2032	High confidence
US 9,146,192	Integrated light scattering and ultraviolet absorption measurement system In force Term ends May 16, 2033 · High confidence	In force	Term ends May 16, 2033	High confidence
US 8,964,177	Method and apparatus to illuminate sample and containing vessel in a light scattering detector In force Term ends Aug 27, 2033 · High confidence	In force	Term ends Aug 27, 2033	High confidence

10 of 67 patents shown.

Pro members see all 67.

Pro members: see all 67 patents

Also on record, not counted in the 67: 1 patent in force now held by others · 24 patents ended · 28 applications pending · 7 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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