Patent US4931306A successfully refreshed from Google Patents.
US4931306A
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High penetration deposition process and apparatus
Assignee: Vapor Technologies Inc
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Filing: 1988-11-25
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Granted: 1990-06-05
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Expires: 2008-11-25
Abstract
Abstract A method and apparatus for deep penetration deposition of material in a porous substrate utilizes a pressure differential across the substrate to effect penetration of arc-produced vapor from one chamber through the body. The one chamber can be held at a pressure of 10-2 to 10-3 torr while the other chamber is at a pressure of 10-5 to 10-6 torr.
Inventors
- 👤 Eduard Pinkhasov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:07
CPC Classifications
C; C23; C23C; C23C14/00; C23C14/22; C23C14/24; C23C14/32; C23C14/325; C23C14/04; C23C14/046
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
108 words
A method of producing a high-density structure, comprising the steps of: (a) disposing a body of a porous material between two chambers; (b) evacuating one of said chambers to a subatmospheric pressure adapted to sustain vapor formation by an electrical discharge; (c) effecting an electrical discharge in said one of said chambers to vaporize a substance therein; and (d) evacuating the other of said chambers to a lower subatmospheric pressure and a higher vacuum than that in said one of said chambers and thereby inducing said substance to penetrate into said body in a vapor state and deposit in interstices thereof in the form of a deposited material.
Claim 2
Independent Claim
108 words
A method of producing a high-density structure, comprising the steps of: (a) disposing a body of a porous material between two chambers; (b) evacuating one of said chambers to a subatmospheric pressure adapted to sustain vapor formation by an electrical discharge; (c) effecting an electrical discharge in said one of said chambers to vaporize a substance therein; and (d) evacuating the other of said chambers to a lower subatmospheric pressure and a higher vacuum than that in said one of said chambers and thereby inducing said substance to penetrate into said body in a vapor state and deposit in interstices thereof in the form of a deposited material.
Claim 3
Dependent Claim
27 words
The method defined in claim 1 wherein said substance is vaporized from an electrode in said one of said chambers by striking an arc with said electrode.
Claim 4
Dependent Claim
36 words
The method defined in claim 2 wherein said arc is struck between electrodes across which a voltage of 20 to 150 volts is applied and the arc has a current of substantially 40 to 150 amperes.
Claim 5
Dependent Claim
43 words
The method defined in claim 2 wherein said subatmospheric pressure in said one of said chambers is substantially 10 -2 to 10 -3 torr and the subatmospheric pressure in the other of said chambers is substantially 10 31 5 to 10 -6 torr.
Claim 6
Dependent Claim
35 words
The method defined in claim 2 wherein said body is a pipe and said one of said chambers is formed within said pipe and the other of said chambers is formed externally of said pipe.
Claim 7
Dependent Claim
19 words
The method defined in claim 2 wherein said deposited material is a ceramic formed by reaction with said substance.
Claim 8
Dependent Claim
33 words
The method defined in claim 6 wherein said ceramic is formed by admitting a reactant to said one of said chambers for reaction with said substance upon the formation of a vapor thereof.
Claim 9
Dependent Claim
31 words
The method defined in claim 6 wherein said ceramic is formed by reaction of said substance with an element from a counterelectrode with which said arc is struck with said electrode.
Claim 10
Dependent Claim
20 words
The method defined in claim 2 wherein said body is a metal matrix which is filled with said deposited material.
Claim 11
Dependent Claim
23 words
The method defined in claim 2 wherein said body is a body of fibers, interstices of which are filled with said deposited material.
Claim 12
Dependent Claim
14 words
The method defined in claim 10 wherein said body of fibers is a fabric.
Claim 13
Dependent Claim
21 words
The method defined in claim 2 wherein said body is a foam, interstices of which are filled with said deposited material.
Claim 14
Independent Claim
107 words
A method of filling pipe holes which comprises the steps of: (a) disposing said pipe between an inner chamber formed within said pipe and an outer chamber surrounding said pipe; (b) evacuating said inner chamber to a subatmospheric pressure adapted to sustain vapor formation by an electrical discharge; (c) effecting an electrical discharge in said inner chamber to vaporize a substance therein; and (d) evacuating said outer chamber to a lower subatmospheric pressure and a higher vacuum than that in said inner chamber and thereby inducing said substance to penetrate into said pipe and deposit in and fill interstices thereof in the form of a deposited material.
Claim 15
Independent Claim
107 words
A method of filling pipe holes which comprises the steps of: (a) disposing said pipe between an inner chamber formed within said pipe and an outer chamber surrounding said pipe; (b) evacuating said inner chamber to a subatmospheric pressure adapted to sustain vapor formation by an electrical discharge; (c) effecting an electrical discharge in said inner chamber to vaporize a substance therein; and (d) evacuating said outer chamber to a lower subatmospheric pressure and a higher vacuum than that in said inner chamber and thereby inducing said substance to penetrate into said pipe and deposit in and fill interstices thereof in the form of a deposited material.
Claim 16
Dependent Claim
16 words
The method defined in claim 13 wherein said deposited material is a ceramic or a metal.
References Cited (Backward Citations)
US3669721A
Cited
US4440808A
Cited
EP0074212A1
Cited
US4545327A
Cited
US4620991A
Cited
US4826704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-04 | 1993-12-04 | 1994-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-04 | 1997-12-04 | 1998-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-04 | 2001-12-04 | 2002-06-05 | $7700.00 | Window Closed / Lapsed |