Patents
US 8269192 B2: Method and apparatus for determining the presence of optical brighteners in water samples
- Granted
- 2012-09-18
- Filed
- 2010-02-02 application 12698424
- Type
- Utility · 20 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
An apparatus and method for making quantitative measurements of the amounts of optical brighteners in water samples using fluorescence measurements at multiple wavelengths. First and second emission wavelength raw measurements are corrected for sample absorption to provide absorption-corrected first emission wavelength and second emission wavelength fluorescence emission values. The absorption-corrected first emission wavelength value is compared to the absorption-corrected second emission wavelength value and to similarly-determined and similarly absorption-corrected emission wavelength values or a ratio thereof obtained from a comparison water sample in which optical brighteners are not present or are only minimally present, to provide a quantitative optical brightener measurement. The apparatus and method may be field-based or laboratory-based, and may operate on a flow-through basis or on discrete samples.
Source: PVGPATDIS, file of 2026-04-10 (ipg120918.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| MOTE MARINE LABORATORY, INC 9 patents | US company or organization | Sarasota, FL | MOTE MARINE LABORATORY, INC. State business registration EXACT high confidence: identical full name and state MOTE MARINE LABORATORY Nonprofit FUZZY medium confidence: same name (governing-board words and legal endings aside) and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Laura Kellie Dixon | Bradenton, FL | 1 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G01J | Measurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light; colorimetry; radiation pyrometry | G01J1/58 | PVGPATDIS, file of 2026-04-10 |
| G01N | Investigating or analysing materials by determining their chemical or physical properties | G01N21/64 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2010-02-02 | Assignment Assignment of assignor's interest | DIXON, LAURA KELLIE signed 2010-02-02 | MOTE MARINE LABORATORY, INC. SARASOTA, FL | 23886/110 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.