Patent US3208828A successfully refreshed from Google Patents.
US3208828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Testing liquefied petroleum gas
Assignee: Shell USA Inc
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Filing: 1962-07-31
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Granted: 1965-09-28
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Expires: 1982-07-31
Abstract
No abstract record available.
Inventors
- 👤 Paul V Peurifoy
- 👤 Jr Milburn J O'neal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:20
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/14; Y; Y10; Y10T; Y10T436/00; Y10T436/18; Y10T436/182
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
THE METHOD OF DETECTING AND DETERMINING THE PRESENCE OF ETHYL MERCAPTAN IN LIQUEFIED PETROLEUM GASES UNDER PRESSURE WHICH COMPRISES: REDUCING THE PRESSURE ON THE LIQUEFIED GAS BY METERING RESTRICTIVE MEANS TO A PREDETERMINED LOWER PRESSURE; VAPORIZING THE LIQUEFIED GAS; FLOWING A PREDETERMINED VOLUME OF THE VAPORIZED LIQUEFIED GAS THROUGH SUCCESSIVE SEPARATE ELONGATED BEDS OF SORPTIVE GRANULAR MATERIAL ALTERNATE ONES OF WHICH ARE OF EQUAL LENGTH AND CARRY A METALLIC SALT REAGENT WHICH UPON CONTACT WITH ETHYL MERCAPTAN CHANGES COLOR OVER A LENGTH WHICH IS DEPENDENT UPON THE CONCENTRATION OF THE ETHYL MERCAPTAN IN THE VAPORIZED LIQUEFIED PETROLEUM GAS, A COMPLETE COLOR CHANGE OF EACH OF SAID ALTERNATE BEDS THEREBY INDICATING A PREDETERMINED CONCENTRATION OF ETHYL MERCAPTAN; AND, THEREAFTER DETERMINING THE NUMBER OF SEPARATE ELONGATED BEDS WHICH HAVE CHANGED COLOR AS AN INDICATION OF THE TOTAL CONCENTRATION OF ETHYL MERCAPTAN IN THE VAPORIZED LIQUEFIED GAS.
Claim 2
Independent Claim
144 words
THE METHOD OF DETECTING AND DETERMINING THE PRESENCE OF ETHYL MERCAPTAN IN LIQUEFIED PETROLEUM GASES UNDER PRESSURE WHICH COMPRISES: REDUCING THE PRESSURE ON THE LIQUEFIED GAS BY METERING RESTRICTIVE MEANS TO A PREDETERMINED LOWER PRESSURE; VAPORIZING THE LIQUEFIED GAS; FLOWING A PREDETERMINED VOLUME OF THE VAPORIZED LIQUEFIED GAS THROUGH SUCCESSIVE SEPARATE ELONGATED BEDS OF SORPTIVE GRANULAR MATERIAL ALTERNATE ONES OF WHICH ARE OF EQUAL LENGTH AND CARRY A METALLIC SALT REAGENT WHICH UPON CONTACT WITH ETHYL MERCAPTAN CHANGES COLOR OVER A LENGTH WHICH IS DEPENDENT UPON THE CONCENTRATION OF THE ETHYL MERCAPTAN IN THE VAPORIZED LIQUEFIED PETROLEUM GAS, A COMPLETE COLOR CHANGE OF EACH OF SAID ALTERNATE BEDS THEREBY INDICATING A PREDETERMINED CONCENTRATION OF ETHYL MERCAPTAN; AND, THEREAFTER DETERMINING THE NUMBER OF SEPARATE ELONGATED BEDS WHICH HAVE CHANGED COLOR AS AN INDICATION OF THE TOTAL CONCENTRATION OF ETHYL MERCAPTAN IN THE VAPORIZED LIQUEFIED GAS.
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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |