US4069120A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photo-electrolytic production of hydrogen
Assignee: RTX Corp
•
Filing: 1976-09-21
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Granted: 1978-01-17
•
Expires: 1996-09-21
Abstract
Abstract Hydrogen and oxygen are produced from water in a process involving the photodissociation of molecular bromine with radiant energy at wavelengths within the visible light region and a subsequent electrolytic dissociation of hydrogen halides.
Inventors
- 👤 Russell Gilbert Meyerand, Jr.
- 👤 Nicholas Leo Krascella
- 👤 David Gue McMahon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:00
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/08; B01J19/12; B01J19/122; B01J19/127; C; C01; C01B; C01B3/00; C01B3/02; C01B3/06; C01B3/103; C01B7/00; C01B7/09; C01B7/093; C01B7/19; C01B7/191; C25; C25B; C25B1/00; C25B1/50; C25B1/55; B01J2219/00; B01J2219/08; B01J2219/0894; Y; Y02; Y02E; Y02E60/00; Y02E60/30; Y02E60/36; Y10; Y10S; Y10S123/00; Y10S123/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
41 words
In the production of hydrogen from water, the improvement which comprises: forming a water/halogen gas mixture; irradiating the mixture with radiation energy in the visible spectrum to form the corresponding hydrogen halide; and electrolytically decomposing the hydrogen halide to produce hydrogen.
Claim 2
Dependent Claim
41 words
In the production of hydrogen from water, the improvement which comprises: forming a water/halogen gas mixture; irradiating the mixture with radiation energy in the visible spectrum to form the corresponding hydrogen halide; and electrolytically decomposing the hydrogen halide to produce hydrogen.
Claim 3
Dependent Claim
11 words
The improvement according to claim 1 wherein the halogen is bromine.
Claim 4
Dependent Claim
64 words
In the production of hydrogen from water, the improvement which comprises: forming a water/bromine gas mixture; irradiating the mixture with radiation in the visible spectrum to form hydrogen bromide; separating the hydrogen bromide; forming a hydrogen bromide/iodine gas mixture; irradiating the hydrogen bromide/iodine gas mixture with radiation in the visible spectrum to form hydrogen iodide, and electrolytically decomposing the hydrogen iodide to form hydrogen.
Claim 5
Dependent Claim
64 words
In the production of hydrogen from water, the improvement which comprises: forming a water/bromine gas mixture; irradiating the mixture with radiation in the visible spectrum to form hydrogen bromide; separating the hydrogen bromide; forming a hydrogen bromide/iodine gas mixture; irradiating the hydrogen bromide/iodine gas mixture with radiation in the visible spectrum to form hydrogen iodide, and electrolytically decomposing the hydrogen iodide to form hydrogen.
Claim 6
Dependent Claim
26 words
The improvement according to claim 3 wherein: iodine monobromide formed in the production of the hydrogen iodide is separated therefrom and decomposed to bromine and iodine.
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) | 1981-01-16 | 1981-07-18 | 1982-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-16 | 1985-07-18 | 1986-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-16 | 1989-07-18 | 1990-01-17 | $7700.00 | Window Closed / Lapsed |