US4414244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface modification to waveguides
Assignee: United States Department of Energy
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Filing: 1982-06-16
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Granted: 1983-11-08
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Expires: 2002-06-16
Abstract
Abstract A method of treating the interior surfaces of a waveguide to improve power transmission comprising the steps of mechanically polishing to remove surface protrusions; electropolishing to remove embedded particles; ultrasonically cleaning to remove any residue; coating the interior waveguide surfaces with an alkyd resin solution or electrophoretically depositing carbon lamp black suspended in an alkyd resin solution to form a 1μ to 5μ thick film; vacuum pyrolyzing the film to form a uniform adherent carbon coating.
Inventors
- 👤 John R. Timberlake
- 👤 David N. Ruzic
- 👤 Richard L. Moore
- 👤 Samuel A. Cohen
- 👤 Dennis M. Manos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:18
CPC Classifications
H; H01; H01P; H01P11/00; H01P11/001; H01P11/002
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
81 words
A method of treating the interior surfaces of a waveguide comprising the steps of: (a) mechanically polishing the interior waveguide surfaces to remove surface protrusions; (b) electropolishing the interior waveguide surfaces with an electrolyte to produce an electrochemically flat surface; (c) ultrasonically cleaning the interior waveguide surfaces with a solvent to remove any residue; (d) applying a 1μ-5μ thick film of an alkyd resin solution to the interior waveguide surfaces; and (e) vacuum pyrolyzing said film to form a carbon coating.
Claim 2
Independent Claim
81 words
A method of treating the interior surfaces of a waveguide comprising the steps of: (a) mechanically polishing the interior waveguide surfaces to remove surface protrusions; (b) electropolishing the interior waveguide surfaces with an electrolyte to produce an electrochemically flat surface; (c) ultrasonically cleaning the interior waveguide surfaces with a solvent to remove any residue; (d) applying a 1μ-5μ thick film of an alkyd resin solution to the interior waveguide surfaces; and (e) vacuum pyrolyzing said film to form a carbon coating.
Claim 3
Dependent Claim
16 words
The method of claim 1 wherein the mechanical polishing removes surface protrusions greater than 0.001 inch.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein said alkyd resin solution comprises 50% by volume of xylene and 50% by volume of an alkyd resin.
Claim 5
Dependent Claim
30 words
The method of claim 2 or 3 wherein steps d and e are repeated a sufficient number of times to form a carbon coating 300 Å to 1400 Å thick.
Claim 6
Dependent Claim
37 words
The method of claim 1 wherein the 1μ-5μ thick film is formed by electrophoretic deposition of carbon lamp black suspended in a solution of 50% by volume of xylene and 50% by volume of an alkyd resin.
Claim 7
Dependent Claim
10 words
The method of claim 1 wherein the electolyte is non-aqueous.
Claim 8
Dependent Claim
10 words
The method of claim 1 wherein the solvent is xylene.
Claim 9
Dependent Claim
29 words
The method of claim 1 wherein the interior waveguide surfaces are formed of stainless steel and the film is vacuum pyrolyzed at a temperature not greater than 400° C.
Claim 10
Dependent Claim
28 words
The method of claim 1 wherein the interior waveguide surfaces are formed of copper and the film is vacuum pyrolyzed at a temperature not greater than 400° C.
References Cited (Backward Citations)
US3037923A
Cited
US3945898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |