US3168378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for analysis of organic compounds
Assignee: Wyeth Holdings LLC
•
Filing: 1961-01-30
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Granted: 1965-02-02
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Expires: 1981-01-30
Abstract
No abstract record available.
Inventors
- 👤 Maresh Charles
- 👤 Sundberg Gertrude
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:24
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/28; G01N30/34; G01N30/04; G01N30/06; Y; Y10; Y10T; Y10T436/00; Y10T436/17; Y10T436/176152; Y10T436/176921; Y10T436/22; Y10T436/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
IN A PROCEDURE FOR DETERMINING AT LEAST THE ELEMENTAL CARBON, HYDROGEN AND NITROGEN CONTENT OF AN ORGANIC COMPOUND BY COMBUSTION WHEREIN A SAMPLE OF SAID COMPOUND IS COMPLETELY PYROLYZED IN A HEAT PACKED COMBUSTION TUBE THOUGH WHICH A SWEEPING GAS IS CONTINUOUSLY BEING PASSED AND RESULTANT VAPORS ARE PASSED THROUGH A ZONE PACKED WITH A METAL SELECTED FROM THE GROUP CONSISTING OF THE OXIDES OF COPPER, NICKEL AND COBALT; AND SUBSEQUENTLY, BUT WHILE STILL IN SAID HEATED COMBUSTION TUBE, THE SO-TREATED VAPORS ARE PASSED THROUGH A ZONE PACKED WITH COPPER METAL HAVING A LARGE SURFACE AREA; THE IMPROVED PROCEDURE CHARACTERIZED BY THE SWEEPING GAS BEING AN INERT GAS HAVING BOILING POINT BELOW THAT OF NITROGEN, PASSING THE SO-TREATED VAPORS CONTAINING THE PRODUCTS OF COMBUSTION IN THE INERT SWEEPING GAS THROUGH AN UNHEATED ZONE PACKED WITH MATERIAL CAPABLE OF CONVERTING ANY WATER VAPOR IN SAID SO-TREATED GASES TO A GAS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, ACETYLENE AND THE LOWER ALKANES, WHICH ARE GASES
Claim 2
Dependent Claim
164 words
IN A PROCEDURE FOR DETERMINING AT LEAST THE ELEMENTAL CARBON, HYDROGEN AND NITROGEN CONTENT OF AN ORGANIC COMPOUND BY COMBUSTION WHEREIN A SAMPLE OF SAID COMPOUND IS COMPLETELY PYROLYZED IN A HEAT PACKED COMBUSTION TUBE THOUGH WHICH A SWEEPING GAS IS CONTINUOUSLY BEING PASSED AND RESULTANT VAPORS ARE PASSED THROUGH A ZONE PACKED WITH A METAL SELECTED FROM THE GROUP CONSISTING OF THE OXIDES OF COPPER, NICKEL AND COBALT; AND SUBSEQUENTLY, BUT WHILE STILL IN SAID HEATED COMBUSTION TUBE, THE SO-TREATED VAPORS ARE PASSED THROUGH A ZONE PACKED WITH COPPER METAL HAVING A LARGE SURFACE AREA; THE IMPROVED PROCEDURE CHARACTERIZED BY THE SWEEPING GAS BEING AN INERT GAS HAVING BOILING POINT BELOW THAT OF NITROGEN, PASSING THE SO-TREATED VAPORS CONTAINING THE PRODUCTS OF COMBUSTION IN THE INERT SWEEPING GAS THROUGH AN UNHEATED ZONE PACKED WITH MATERIAL CAPABLE OF CONVERTING ANY WATER VAPOR IN SAID SO-TREATED GASES TO A GAS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, ACETYLENE AND THE LOWER ALKANES, WHICH ARE GASES
References Cited (Backward Citations)
US2753246A
Cited
US2905536A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |