US4257854A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing objects with a supersmooth aluminum surface
Assignee: US Philips Corp
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Filing: 1979-11-19
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Granted: 1981-03-24
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Expires: 1999-11-19
Abstract
Abstract Method of producing objects having an aluminum surface of a supersmooth quality by applying an aluminum layer which is at least 10 micron thick onto the surface of the object from an electroplating bath and by thereafter subjecting the object to a mechanical machining precision operation. The aluminum layer is preferably electroplated by means of an anhydrous bath with an aprotic solvent.
Inventors
- 👤 Theo E. G. Daenen
- 👤 Johannes M. Oomen
- 👤 Joseph F. M. Van de Berg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:54
CPC Classifications
B; B23; B23P; B23P25/00; C; C25; C25D; C25D3/00; C25D3/02; C25D3/42; C25D3/44; C25D7/00; C25D7/08; G; G02; G02B; G02B5/00; G02B5/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
58 words
A method of producing an article having an aluminum surface with a surface with a maximum surface roughness R T of not more than 0.02 microns comprising forming by electroplating a layer of aluminum of at least 10 microns thick on an article having a metallic surface and then subjecting said aluminum surface to a mechanical polishing operation.
Claim 2
Independent Claim
58 words
A method of producing an article having an aluminum surface with a surface with a maximum surface roughness R T of not more than 0.02 microns comprising forming by electroplating a layer of aluminum of at least 10 microns thick on an article having a metallic surface and then subjecting said aluminum surface to a mechanical polishing operation.
Claim 3
Dependent Claim
14 words
The method of claim 1 wherein the mechanical polishing operation is a cutting operation.
Claim 4
Dependent Claim
15 words
The method of claim 2 wherein the cutting operation is carried out by diamond tools.
Claim 5
Dependent Claim
35 words
The method of claim 1 wherein the aluminum layer is obtained from an electroplating bath containing an anhydrous aluminum compound and an alkali aluminum hydride or an alkaline earth aluminum hydride in an aprotic solvent.
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) | 1984-03-23 | 1984-09-22 | 1985-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-23 | 1988-09-22 | 1989-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-23 | 1992-09-22 | 1993-03-24 | $7700.00 | Window Closed / Lapsed |