Patent US2937276A successfully refreshed from Google Patents.
US2937276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quantitative determination of metals
Assignee: Standard Oil Co
•
Filing: 1956-03-29
•
Granted: 1960-05-17
•
Expires: 1976-03-29
Abstract
No abstract record available.
Inventors
- 👤 Thomas L Thourson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:41
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/02; G01N23/06; G01N23/12; G01N23/083
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
THE METHOD OF CONTINUOUSLY DETERMINING THE CONCENTRATION OF TETRAETHYLLEAD IN A FLOWING HYDROCARBON SAMPLE STREAM WHICH COMPRISES SUBJECTING A FLOWING SAMPLE STREAM TO X-RAY RADIATION, SAID X-RAYS BEING SUBSTANTIALLY INSENSITIVE TO CARBON TO HYDROGEN RATIO OF THE SAMPLE, SIMULTANEOUSLY SUBJECTING A VARIABLE STANDARD ABSORBER MEANS TO LIKE X-RAY RADIATION, VARYING A PORTION OF SAID ABSORBER MEANS TO EQUAL THE X-RAY ABSORPTION OF THE SAMPLE STREAM, CONTINUOUSLY MONITORING THE DENSITY OF THE SAMPLE STREAM AND OBTAINING AN ELECTRICAL QUANTITY CORRESPONDING TO ANY CHANGES IN DENSITY, ADJUSTING THE EFFICIENCY OF ANOTHER PORTION OF SAID ABSORBER MEANS IN RE-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-17 | 1963-11-16 | 1964-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-17 | 1967-11-16 | 1968-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-17 | 1971-11-16 | 1972-05-17 | $7700.00 | Window Closed / Lapsed |