US4582588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of anodizing and sealing aluminum
Assignee: Spheral Solar Power Inc
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Filing: 1984-09-04
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Granted: 1986-04-15
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Expires: 2004-09-04
Abstract
Abstract The disclosure relates to a method of sealing the surface of an aluminum member, such as an aluminum foil, from the environment by first placing the foil in an H 2 SO 4 bath to form an oxide which normally will not provide a total seal of the aluminum from the environment and then placing the aluminum member with oxide thereon in an H 3 PO 4 bath to close the pores in the oxide layer and provide sealing of the aluminum from the environment. This process also passivates the silicon.
Inventors
- 👤 Millard J. Jensen
- 👤 Jules D. Levine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:21
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/18; C25D11/20; C25D11/06; C25D11/08; C25D11/16
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
67 words
A method of anodizing and sealing a combination of aluminum and semiconductor material comprising the steps of: (a) providing an aluminum member coupled to a semiconductor material, (b) forming an oxide coating on said aluminum member, and (c) anodizing said member from (b) in a solution of about 0.5% H 3 PO 4 for about one half minute to seal the aluminum and oxidizing said semiconductor material.
Claim 2
Independent Claim
67 words
A method of anodizing and sealing a combination of aluminum and semiconductor material comprising the steps of: (a) providing an aluminum member coupled to a semiconductor material, (b) forming an oxide coating on said aluminum member, and (c) anodizing said member from (b) in a solution of about 0.5% H 3 PO 4 for about one half minute to seal the aluminum and oxidizing said semiconductor material.
Claim 3
Dependent Claim
31 words
A method as set forth in claim 1 wherein step (b) comprises placing said aluminum member in a bath of about 10% H 2 SO 4 for about one half minute.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-14 | 1989-10-14 | 1990-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-14 | 1993-10-14 | 1994-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-14 | 1997-10-14 | 1998-04-15 | $7700.00 | Window Closed / Lapsed |