Patents
US 12693213 B2: Per-frequency correction of spectroscopic interference
- Granted
- 2026-07-28
- Filed
- 2023-10-31 application 18385806
- Type
- Utility · 11 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Improved correction of optical absorption spectroscopy results for trace gas detection is provided by correcting for species crosstalk (and other environmental effects) on a per-frequency basis. Analyte concentrations are then determined by curve fitting to the corrected absorption spectrum. This is in marked contrast to the conventional approach of first performing a curve fit to determine analyte concentrations, then correcting the analyte concentrations to account for species crosstalk and other environmental effects. In some embodiments, the number of parameters for the per-frequency corrections are automatically determined from the data (e.g., using a LASSO regression).
Source: PTBLXML, file of 2026-07-28 (ipgb20260728.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Picarro, Inc. 59 patents | US company or organization | Santa Clara, CA | PTBLXML, file of 2026-07-28 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Chris W. Rella | Sunnyvale, CA | 45 | PTBLXML, file of 2026-07-28 | |
| Andrea Biasioli | Irvine, CA | PTBLXML, file of 2026-07-28 | ||
| Craig M. Haupt | Sunnyvale, CA | PTBLXML, file of 2026-07-28 | ||
| Kai M. Skog | San Jose, CA | 2 | PTBLXML, file of 2026-07-28 | |
| John A. Hoffnagle | San Jose, CA | 9 | PTBLXML, file of 2026-07-28 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G01N | Investigating or analysing materials by determining their chemical or physical properties | G01N21/274 | PTBLXML, file of 2026-07-28 |
| G01J | Measurement of intensity, velocity, spectral content, polarisation, phase or pulse characteristics of infrared, visible or ultraviolet light; colorimetry; radiation pyrometry | G01J3/42 | PTBLXML, file of 2026-07-28 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2024-12-15 | Assignment Assignment of assignor's interest | RELLA, CHRIS W. signed 2023-10-31 BIASIOLI, ANDREA signed 2023-10-31 HAUPT, CRAIG M. signed 2023-10-31 SKOG, KAI M. signed 2023-10-31 HOFFNAGLE, JOHN A. signed 2023-10-31 | PICARRO, INC. SANTA CLARA, CA | 69589/447 | PASDL, file of 2026-08-13 |
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.