Patent US2540152A successfully refreshed from Google Patents.
US2540152A
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Recovery of light elemental gases
Assignee: Individual
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Filing: 1949-12-10
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Granted: 1951-02-06
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Expires: 1969-12-10
Abstract
No abstract record available.
Inventors
- 👤 Sol W Weller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:09
CPC Classifications
C; C01; C01B; C01B3/00; C01B3/50; C01B3/501; C01B3/503; B; B01; B01D; B01D53/00; B01D53/22; B01D53/225; B01D53/226; C01B23/00; C01B2203/00; C01B2203/04; C01B2203/0405; C01B2203/0465; C01B2203/047; C01B2203/0475; C01B2203/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PROCESS FOR THE RECOVERY OF LIGHT ELEMENTAL GASES SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND HELIUM FROM A GAS MIXTURE COMPRISING ONE OF THESE GASES AND AT LEAST ONE OTHER GAS COMPRISING THE STEPS OF BRINGING SAID GAS MIXTURE INTO CONTACT WITH ONE SIDE OF A THIN, NONPOROUS MEMBRANE COMPRISED ESSENTIALLY OF A PLASTIC, FILM-FORMING MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYSTYRENE AND ETHYL CELLULOSE, CAUSING A PORTION OF SAID GAS MIXTURE TO PERMEATE THROUGH SAID MEMBRANE, AND REMOVING THE PERMEATED GAS FROM THE OPPOSITE SIDE OF SAID MEMBRANE.
Claim 2
Dependent Claim
92 words
A PROCESS FOR THE RECOVERY OF LIGHT ELEMENTAL GASES SELECTED FROM THE GROUP CONSISTING OF HYDROGEN AND HELIUM FROM A GAS MIXTURE COMPRISING ONE OF THESE GASES AND AT LEAST ONE OTHER GAS COMPRISING THE STEPS OF BRINGING SAID GAS MIXTURE INTO CONTACT WITH ONE SIDE OF A THIN, NONPOROUS MEMBRANE COMPRISED ESSENTIALLY OF A PLASTIC, FILM-FORMING MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYSTYRENE AND ETHYL CELLULOSE, CAUSING A PORTION OF SAID GAS MIXTURE TO PERMEATE THROUGH SAID MEMBRANE, AND REMOVING THE PERMEATED GAS FROM THE OPPOSITE SIDE OF SAID MEMBRANE.
References Cited (Backward Citations)
GB266396A
Cited
US2388095A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-05 | 1954-08-07 | 1955-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-05 | 1958-08-07 | 1959-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-05 | 1962-08-07 | 1963-02-06 | $7700.00 | Window Closed / Lapsed |