US3246450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of hydrogen
Assignee: Union Carbide Corp
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Filing: 1959-06-09
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Granted: 1966-04-19
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Expires: 1979-06-09
Abstract
No abstract record available.
Inventors
- 👤 Stern Silvin Alexander
- 👤 Paul H Mohr
- 👤 Paul J Gareis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:49
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/06; B01D71/30; B01D71/32; B01D71/36; C; C01; C01B; C01B3/00; C01B3/50; C01B3/501; C01B3/503; C01B2203/00; C01B2203/04; C01B2203/0405; C01B2203/0465; C01B2203/047; C01B2203/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A PROCESS FOR THE RECOVERY OF HYDROGEN FROM A GAS MIXTURE COMPRISING HYDROGEN AND AT LEAST ONE OTHER GAS SELECTED FROM THE GROUP CONSISTING OF CARBON MONOXIDE, ARGON, AND GASEOUS HYDROCARBONS COMPRISING THE STEPS OF CONTACTING SUCH GAS MIXTURE WITH ONE SIDE OF A THIN NONPOROUS MEMBRANE COMPRISED ESSENTIALLY OF A PLASTIC, FILMFORMING, FLUORINATED MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYTETRAFLUOROETHYLENE, AND A COPOLYMER OF VINLIDENE FLUORIDE AND HEXAFLUOROPROPYLENE; PERMEATING A PORTION OF SAID GAS MIXTURE THROUGH THE MEMBRANE, SAID PORTION HAVING A GREATER CONCENTRATION OF HYDROGEN THAN THE GAS MIXURE; AND REMOVING THE PERMEATED GAS FROM THE OPPOSITE SIDE OF SAID MEMBRANE.
Claim 2
Dependent Claim
104 words
A PROCESS FOR THE RECOVERY OF HYDROGEN FROM A GAS MIXTURE COMPRISING HYDROGEN AND AT LEAST ONE OTHER GAS SELECTED FROM THE GROUP CONSISTING OF CARBON MONOXIDE, ARGON, AND GASEOUS HYDROCARBONS COMPRISING THE STEPS OF CONTACTING SUCH GAS MIXTURE WITH ONE SIDE OF A THIN NONPOROUS MEMBRANE COMPRISED ESSENTIALLY OF A PLASTIC, FILMFORMING, FLUORINATED MATERIAL SELECTED FROM THE GROUP CONSISTING OF POLYTETRAFLUOROETHYLENE, AND A COPOLYMER OF VINLIDENE FLUORIDE AND HEXAFLUOROPROPYLENE; PERMEATING A PORTION OF SAID GAS MIXTURE THROUGH THE MEMBRANE, SAID PORTION HAVING A GREATER CONCENTRATION OF HYDROGEN THAN THE GAS MIXURE; AND REMOVING THE PERMEATED GAS FROM THE OPPOSITE SIDE OF SAID MEMBRANE.
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) | 1969-04-18 | 1969-10-18 | 1970-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-18 | 1973-10-18 | 1974-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-18 | 1977-10-18 | 1978-04-19 | $7700.00 | Window Closed / Lapsed |