US3711248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for mercury concentration measurement
Assignee: Environment One Corp
•
Filing: 1971-07-28
•
Granted: 1973-01-16
•
Expires: 1991-07-28
Abstract
Abstract ACCURATE DETERMINATION OF THE CONCENTRATION, CALCULATED AS ELEMENTAL MERCURY, OF A SAMPLE GASEOUS, LIQUID OR SOLID MEDIUM CONTAINING MERCURY, EITHER IN ELEMENTAL OR REDUCIBLE FORM, IS OBTAINED BY (1) THE REDUCTION OF MERCURY CONTAINING COMPOUNDS WHERE NECESSARY TO ELEMENTAL MERCURY IN VAPOR FORM; (2) CONVERSION OF THE MERCURY CONTENT TO CONDENSATION NUCLEI; AND (3) THE MEASUREMENT OF THE RESULTANT CONDENSATION NUCLEI TO YIELD AN ACCURATE INDICATION OF THE CONCENTRATION, CALCULATED AS ELEMENTAL MERCURY, OF MERCURY IN THE SAMPLE MEDIUM.
Inventors
- 👤 P Coffey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:02
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/005
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |