US3352644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analysis of hydrogen
Assignee: North American Aviation Corp
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Filing: 1964-09-18
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Granted: 1967-11-14
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Expires: 1984-09-18
Abstract
No abstract record available.
Inventors
- 👤 Lysyi Ihor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:37
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/28; G01N1/40; G01N1/405; G01N25/00; G01N25/18; G01N30/00; G01N30/02; G01N30/04; G01N30/06; G01N30/14; Y; Y10; Y10T; Y10T436/00; Y10T436/22; Y10T436/25; Y10T436/25125; Y10T436/25375; Y10T436/255
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A METHOD FOR DETERMINING THE RESPECTIVE CONCENTRATIONS OF IMPURITIES IN A SAMPLE SOURCE OF HYDROGEN COMPRISING THE STEP OF: PASSING AN IMPURE SAMPLE STREAM FROM A SAMPLE SOURCE OF HYDROGEN AT A KNOWN VOLUME RATE INTO A TRAP FOR A KNOWN PERIOD OF TIME; THEREBY TRAPPING IMPURITIES FROM THE STREAM IN THE TRAP; PURIFYING AN UPSTREAM PORTION OF THE STREAM OF SAID SAMPEL HYDROGEN, SUBSEQUENTLY PASSING THE THUS PURIFIED UPSTREAM PORTION FROM THE SAMPLE HYDROGEN SOURCE AT A KNOWN VOLUME RATE THROUGH THE TRAP FOR USE AS A CARRIER GAS TO PICK UP THE IMPURITIES CONTAINED IN THE TRAP; AND PASSING SAID PURIFIED STREAM NOW LADEN WITH INPURITIES FROM THE TRAP INTO A CALIBRATED CHROMATOGRAPHIC COLUMN AND DETECTOR TO; THEREBY ANALYZE THE HYDROGEN SAMPLE FOR INPURITIES.
Claim 2
Independent Claim
126 words
A METHOD FOR DETERMINING THE RESPECTIVE CONCENTRATIONS OF IMPURITIES IN A SAMPLE SOURCE OF HYDROGEN COMPRISING THE STEP OF: PASSING AN IMPURE SAMPLE STREAM FROM A SAMPLE SOURCE OF HYDROGEN AT A KNOWN VOLUME RATE INTO A TRAP FOR A KNOWN PERIOD OF TIME; THEREBY TRAPPING IMPURITIES FROM THE STREAM IN THE TRAP; PURIFYING AN UPSTREAM PORTION OF THE STREAM OF SAID SAMPEL HYDROGEN, SUBSEQUENTLY PASSING THE THUS PURIFIED UPSTREAM PORTION FROM THE SAMPLE HYDROGEN SOURCE AT A KNOWN VOLUME RATE THROUGH THE TRAP FOR USE AS A CARRIER GAS TO PICK UP THE IMPURITIES CONTAINED IN THE TRAP; AND PASSING SAID PURIFIED STREAM NOW LADEN WITH INPURITIES FROM THE TRAP INTO A CALIBRATED CHROMATOGRAPHIC COLUMN AND DETECTOR TO; THEREBY ANALYZE THE HYDROGEN SAMPLE FOR INPURITIES.
References Cited (Backward Citations)
US3116115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-13 | 1971-05-15 | 1971-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-13 | 1975-05-15 | 1975-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-13 | 1979-05-15 | 1979-11-14 | $7700.00 | Window Closed / Lapsed |