Patent US5734092A successfully refreshed from Google Patents.
US5734092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Planar palladium structure
Assignee: Agilent Technologies Inc
•
Filing: 1996-04-30
•
Granted: 1998-03-31
•
Expires: 2016-04-30
Abstract
Abstract A planar palladium structure makes use of the unique properties of palladium to provide a hydrogen permeable membrane suitable for use in providing, for example, selective control of a nominal gas pressure within a cavity. The contemplated planar palladium structure includes a planar substrate having upper and lower major surfaces and an array of microfine channels therebetween, wherein the channels allow gaseous communication between the upper and lower major surfaces, and an array of palladium deposits being distributed on the substrate and located with respect to the microfine channels so as to restrict the gaseous communication to diffusion of hydrogen gas.
Inventors
- 👤 Tak K. Wang
- 👤 James W. Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:04
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/22; B01D53/228; B01D69/00; B01D69/10; B01D69/108; B01D71/00; B01D71/02; B01D71/022; B01D71/0223; B01D71/02231; C; C01; C01B; C01B3/00; C01B3/50; C01B3/501; C01B3/503; C01B3/505; G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/28; G01N30/30; G01N2030/022; G01N2030/025; G01N2030/3007; G01N2030/3084
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
101 words
A planar palladium structure, comprising: a planar substrate having upper and lower major surfaces and an array of channels extending therebetween, said channels allowing gaseous communication between said upper and lower major surfaces; and an array of plural, discrete palladium deposits being distributed on the substrate, said deposits being located in respective channels, said array being distributed with respect to said channels so as to restrict said gaseous communication between said upper and lower major surfaces to a diffusion of hydrogen gas through said deposits; whereby the substrate constrains the deformation of the palladium deposits due to the diffused hydrogen gas.
Claim 2
Dependent Claim
101 words
A planar palladium structure, comprising: a planar substrate having upper and lower major surfaces and an array of channels extending therebetween, said channels allowing gaseous communication between said upper and lower major surfaces; and an array of plural, discrete palladium deposits being distributed on the substrate, said deposits being located in respective channels, said array being distributed with respect to said channels so as to restrict said gaseous communication between said upper and lower major surfaces to a diffusion of hydrogen gas through said deposits; whereby the substrate constrains the deformation of the palladium deposits due to the diffused hydrogen gas.
Claim 3
Dependent Claim
29 words
The structure of claim 1, wherein each of the palladium deposits comprises a thin film layer having an average thickness in the range of 0.1 micrometers to 1 millimeter.
Claim 4
Dependent Claim
25 words
The structure of claim 1, wherein each of the palladium deposits comprises a discrete thin film layer located within the respective one of said channels.
Claim 5
Dependent Claim
28 words
The structure of claim 1, wherein each of the palladium deposits comprises a discrete thin film layer located over an end of the respective one of said channels.
Claim 6
Dependent Claim
35 words
The structure of claim 1, wherein the substrate further comprises a composition of material capable of resisting the flow of electric current therethrough so as to exhibit a temperature increase by way of resistive heating.
Claim 7
Dependent Claim
14 words
The structure of claim 1, wherein the substrate further comprises an integral heating element.
Claim 8
Dependent Claim
11 words
The structure of claim 1, wherein the channels are regularly spaced.
Claim 9
Dependent Claim
11 words
The structure of claim 1, wherein said channels are irregularly spaced.
Claim 10
Dependent Claim
13 words
The structure of claim 1, wherein the substrate is formed of porous material.
Claim 11
Dependent Claim
147 words
A hydrogen pump system comprising: a housing that defines a closed cavity; a planar palladium structure attached within the closed cavity so as to provide upper and lower subcavities, said planar palladium structure including a planar substrate having upper and lower major surfaces and an array of hollow channels extending therebetween, said channels allowing gaseous communication between said upper and lower major surfaces, and an array of plural, discrete palladium deposits being distributed on the substrate, said deposits being located in a respective channels, said array being distributed with respect to said channels so as to restrict said gaseous communication between said upper and lower major surfaces to diffusion of hydrogen gas through said deposits; whereby the substrate constrains the deformation of the palladium deposits due to the diffused hydrogen gas; and a system for providing hydrogen in at least one of the upper and lower subcavities.
Claim 12
Dependent Claim
147 words
A hydrogen pump system comprising: a housing that defines a closed cavity; a planar palladium structure attached within the closed cavity so as to provide upper and lower subcavities, said planar palladium structure including a planar substrate having upper and lower major surfaces and an array of hollow channels extending therebetween, said channels allowing gaseous communication between said upper and lower major surfaces, and an array of plural, discrete palladium deposits being distributed on the substrate, said deposits being located in a respective channels, said array being distributed with respect to said channels so as to restrict said gaseous communication between said upper and lower major surfaces to diffusion of hydrogen gas through said deposits; whereby the substrate constrains the deformation of the palladium deposits due to the diffused hydrogen gas; and a system for providing hydrogen in at least one of the upper and lower subcavities.
Claim 13
Dependent Claim
18 words
The hydrogen pump system of claim 10, further comprising means for heating or cooling the planar palladium structure.
References Cited (Backward Citations)
US1174631A
Cited
US2961062A
Cited
US3246764A
Cited
US3665680A
Cited
US3718434A
Cited
US4024036A
Cited
US4329157A
Cited
US4364759A
Cited
US4318828A
Cited
US4713234A
Cited
US4761164A
Cited
US4886048A
Cited
US5139975A
Cited
US5304330A
Cited
US5498278A
Cited
US5545784A
Cited
US5451386A
Cited
US5569633A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-03-30 | 2001-09-29 | 2002-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-03-30 | 2005-09-29 | 2006-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-03-30 | 2009-09-29 | 2010-03-31 | $7700.00 | Window Closed / Lapsed |