Patents
US 10400338 B2: pH stable trivalent chromium coating solutions
- Granted
- 2019-09-03
- Filed
- 2018-05-14 application 15978980
- Type
- Utility · 31 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A stable trivalent chromium coating solution can be prepared by heating the chromium coating solution and adjusting the pH of the chromium coating solution. The coating solution can be heated to at least 35° C. for no more than 24 hours. While the solution is hot, a basic or acidic material can be added to increase or reduce the pH to a target value, respectively. In some embodiments, the chromium coating solution can have a pH of 3.5 to 4.0 and the pH can vary no more than ±0.15 while in storage for at least 20 days. The trivalent chromium coating solution can include a fluoride compound, a zirconate compound, a corrosion inhibitor compound, a chelating agent, a phosphorous compound, and/or other compounds.
Source: PVGPATDIS, file of 2026-04-10 (ipg190903.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Chemeon Surface Technology, LLC 8 patents | US company or organization | Minden, NV | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Jake Cruson | Dayton, NV | 3 | PVGPATDIS, file of 2026-04-10 | |
| Sjon Westre | Carson City, NV | 7 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| C23C | Coating metallic material; coating material with metallic material; surface treatment of metallic material by diffusion into the surface, by chemical conversion or substitution; coating by vacuum evaporation, by sputtering, by ion implantation or by chemical vapour deposition, in general | C23C22/34 | 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 |
|---|---|---|---|---|---|
| 2018-07-02 | Assignment Assignment of assignor's interest | WESTRE, SJON signed 2018-06-08 | CHEMEON SURFACE TECHNOLOGY, LLC MINDEN, NV | 46252/572 | ECORSEXC, file of 2026-09-25 |
| 2018-06-21 | Assignment Assignment of assignor's interest | CRUSON, JAKE signed 2018-06-18 | CHEMEON SURFACE TECHNOLOGY, LLC MINDEN, NV | 46163/347 | 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.