Patents
US 9435687 B1: Method to remove the spectral components of illumination energy from a sample spectrum without the use of optical barrier filters, and apparatus for the same
- Granted
- 2016-09-06
- Filed
- 2014-10-06 application 14506704
- Type
- Utility · 6 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
The present invention is a method of obtaining and isolating sample spectra from a wide wavelength illumination source without the use of filters. The method obtains the combined sample and illumination spectra of a sample and removes the illumination spectrum from the combined spectrum. This is accomplished by obtaining both the combined sample/illumination spectrum and the illumination spectrum separately at the same time and under the same environmental and instrument conditions. The illumination spectrum is then subtracted, wavelength by wavelength from the combined sample/illumination spectrum, leaving the pure sample spectrum which may a single spectrum or combination of two or more spectra from different types and/or compounds in the sample.
Source: PVGPATDIS, file of 2026-04-10 (ipg160906.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Center for Quantitative Cytometry 12 patents | US company or organization | San Juan, PR | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Abraham Schwartz | San Juan, PR | 24 | PVGPATDIS, file of 2026-04-10 | |
| Martin C. Cohen | Laurel, MD | 1 | PVGPATDIS, file of 2026-04-10 | |
| Peter Ingram | Raleigh, NC | 5 | 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 | G01J3/0297 | PVGPATDIS, file of 2026-04-10 |
| G01N | Investigating or analysing materials by determining their chemical or physical properties | G01N21/274 | 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 |
|---|---|---|---|---|---|
| 2014-11-12 | Assignment Assignment of assignor's interest | INGRAM, PETER signed 2014-11-04 COHEN, MARTIN C signed 2014-11-05 SCHWARTZ, ABRAHAM signed 2014-11-10 | CENTER FOR QUANTITATIVE CYTOMETRY SAN JUAN, PR | 34152/573 | 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.