US3298160A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-solid chromatography using column comprising agno3-coated alumina
Assignee: Individual
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Filing: 1966-06-27
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Granted: 1967-01-17
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Expires: 1986-06-27
Abstract
No abstract record available.
Inventors
- 👤 Richard L Hoffmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:46
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/04; G01N30/06; G01N30/14; B; B01; B01J; B01J20/00; B01J20/02; B01J20/0203; B01J20/0233; B01J20/0274; B01J20/0296; B01J20/06; B01J20/08; B01J20/281; B01J20/282; B01J20/284; B01J20/286; B01J20/30; B01J20/32; B01J20/3202; B01J20/3204; B01J20/3231; B01J20/3234; B01J20/3236; G01N33/00; G01N33/26; G01N33/28; G01N33/2829; B01J2220/00; B01J2220/50; B01J2220/54; G01N2030/143; G01N30/50; G01N30/52; G01N2030/524; G01N30/62; G01N30/64; G01N30/68
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
95 words
A PROCESS FOR REMOVING HYDROCARBON CONTAMINANTS FROM INEXPENSIVE PRESSURIZED SOURCES OF OXYGEN AND OF INERT CARRIER GAS SO AS TO PERMIT THEIR USE IN THE FLAME IONIZATION EQUIPPED GAS-SOLID CHRONATOGRAPHY OF VOLATILE HYDROCARBONS, SAID PROCESS COMPRISING PASSING THE HYDROCARBON CONTAMINATED GAS THROUGH AT LEAST ABOUT 6 INCHES OF LIGHT-PROTECTED GRANULAR ALUMINA IMPREGNATED WITH NOT LESS THAN ABOUT 30 PERCENT OF SOLID AGNO3 BASED ON THE DRY WEIGHT OF THE ALUMINA, THE AGNO3-IMPREGNATED ALUMINA BEING HELD AT A TEMPERATURE OF ABOUT 75*C., AND DIRECTLY CONDUCTING THE EMERGENT CONTAMINANT-FREE GAS TO A NONIMPREGNATED ALUMINA GAS CHROMATOGRAPHY COLUMN.
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) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |