US4247361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of etching a surface of a body
Assignee: Boeing North American Inc
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Filing: 1979-06-18
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Granted: 1981-01-27
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Expires: 1999-06-18
Abstract
Abstract A method of etching a surface of a body including the steps of applying a suitable modified epoxy thermo-setting adhesive coating to an etchant resisting masking film; punching the masking film in a predetermined pattern corresponding to the pattern to be etched on the body; applying the masking film to a major surface of the body to be etched, thereby exposing a portion of the major surface corresponding to the predetermined pattern; setting the adhesive coating by applying heat so that the masking film is securely attached to the body; and subsequently applying an etchant to the body covered by the making film so that the predetermined pattern is etched into the major surface of the body.
Inventors
- 👤 Joseph M. Shaheen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:09
CPC Classifications
C; C04; C04B; C04B41/00; C04B41/009; C03; C03C; C03C15/00; C04B41/53; C04B41/5338; C04B41/5353; C04B41/80; C04B41/91; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1056
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
130 words
A method of etching a surface of a body including the steps of: applying a suitably flexible thermo-setting nylon epoxy resin adhesive coating to a relatively thin etchant resisting masking film composed of a copolymer of tetrafluoroethylene and hexafluoro-propylene; subsequently punching said masking film in a predetermined pattern corresponding to the pattern to be etched on the body; applying said masking film to a major surface of the body to be etched, thereby exposing a portion of the major surface corresponding to the predetermined pattern; setting said adhesive coating by applying heat so that said masking film is securely attached to said body; and subsequently applying an etchant to the body covered by said masking film so that said predetermined pattern is etched in said major surface of the body.
Claim 2
Independent Claim
130 words
A method of etching a surface of a body including the steps of: applying a suitably flexible thermo-setting nylon epoxy resin adhesive coating to a relatively thin etchant resisting masking film composed of a copolymer of tetrafluoroethylene and hexafluoro-propylene; subsequently punching said masking film in a predetermined pattern corresponding to the pattern to be etched on the body; applying said masking film to a major surface of the body to be etched, thereby exposing a portion of the major surface corresponding to the predetermined pattern; setting said adhesive coating by applying heat so that said masking film is securely attached to said body; and subsequently applying an etchant to the body covered by said masking film so that said predetermined pattern is etched in said major surface of the body.
Claim 3
Dependent Claim
15 words
A method as defined in claim 1, wherein said etchant is a solution of HF.
Claim 4
Dependent Claim
14 words
A method as defined in claim 1, wherein said body is a quartz disk.
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) | 1984-01-27 | 1984-07-28 | 1985-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-27 | 1988-07-28 | 1989-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-27 | 1992-07-28 | 1993-01-27 | $7700.00 | Window Closed / Lapsed |