Patents
US 9453798 B2: Method for determination of system parameters for reducing crude unit corrosion
- Granted
- 2016-09-27
- Filed
- 2011-04-27 application 13095042
- Type
- Utility · 20 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
The invention provides a method and apparatus for determining the amount of various materials in a liquid sample. Because the apparatus is particularly resilient it can be used repeatedly with very harsh liquid samples such as boot water from an oil refinery. The apparatus uses at least one volume and/or concentration independent optical analysis method to determine at least one of: the pH, amount of chloride, and/or amount of iron in the sample. The optical property can be colorimetric, fluorescent or both and result from adding dyes, complexing agents, turbidity inducing compounds, and other optically effecting reagents to the sample. Because the measurements are concentration and volume independent they can be done continuously, quickly, and avoid the inconvenient start and stop procedures in prior art measurement regimens.
Source: PVGPATDIS, file of 2026-04-10 (ipg160927.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Nalco Company LLC 271 patents | US company or organization | Naperville, IL | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Rodney H. Banks | Aurora, IL | 19 | PVGPATDIS, file of 2026-04-10 | |
| Steven R. Ciota | Downers Grove, IL | 2 | PVGPATDIS, file of 2026-04-10 | |
| Sascha J. Welz | Chicago, IL | 8 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G01N | Investigating or analysing materials by determining their chemical or physical properties | G01N21/77 | PVGPATDIS, file of 2026-04-10 |
| Y10T | Technical subjects covered by former us classification | Y10T436/19 | 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 |
|---|---|---|---|---|---|
| 2017-08-09 | Name change Change of name | NALCO COMPANY signed 2015-12-31 | NALCO COMPANY LLC NAPERVILLE, IL | 43494/584 | ECORSEXC, file of 2026-09-25 |
| 2017-08-09 | Assignment Assignment of assignor's interest | NALCO COMPANY LLC signed 2017-02-27 | ECOLAB USA INC. SAINT PAUL, MN | 43242/687 | ECORSEXC, file of 2026-09-25 |
| 2011-04-27 | Assignment Assignment of assignor's interest | BANKS, RODNEY H. signed 2011-04-20 CIOTA, STEVEN R. signed 2011-04-20 WELZ, SASCHA J. signed 2011-04-26 | NALCO COMPANY NAPERVILLE, IL | 26186/483 | 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.