Patent US4145261A successfully refreshed from Google Patents.
US4145261A
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US
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Electrolyte-liquid for the electrodeposition of aluminum
Assignee: US Philips Corp
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Filing: 1978-02-27
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Granted: 1979-03-20
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Expires: 1998-02-27
Abstract
Abstract Electrolyte-liquid for electro-depositing aluminum. The liquid comprises an aprotic solvent with ether structure, a second aprotic solvent which is inert or which is capable of forming a coordinative compound, anhydrous aluminum chloride and a metal hydride. The solvent with ether structure has the formula RO -- (CH 2 ) m -- O -- (CH 2 ) n -- OR' wherein m and n are integers between 1 and 6 and R and R' are alkyl groups.
Inventors
- 👤 Theo E. G. Daenen
- 👤 Steven A. Stolk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:17
CPC Classifications
C; C25; C25D; C25D3/00; C25D3/02; C25D3/42; C25D3/44
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
73 words
A non-aqueous plating bath comprising a solution of anhydrous aluminum chloride and an alkali metal hydride in a mixture of a first anhydrous aprotic solvent having a flashpoint over 40° C. and of the formula RO -- (CH 2 ) m -- O -- (CH 2 ) n OR' wherein m and n are integers between 1 and 6 inclusive and R and R' are each alkyl and a second anhydrous aprotic solvent.
Claim 2
Dependent Claim
73 words
A non-aqueous plating bath comprising a solution of anhydrous aluminum chloride and an alkali metal hydride in a mixture of a first anhydrous aprotic solvent having a flashpoint over 40° C. and of the formula RO -- (CH 2 ) m -- O -- (CH 2 ) n OR' wherein m and n are integers between 1 and 6 inclusive and R and R' are each alkyl and a second anhydrous aprotic solvent.
Claim 3
Dependent Claim
17 words
The plating bath of claim 1 wherein the second aprotic solvent is inert to the aluminum chloride.
Claim 4
Dependent Claim
22 words
The plating bath of claim 1 wherein the second anhydrous aprotic solvent is capable of forming a coordination compound with aluminum chloride.
Claim 5
Dependent Claim
16 words
The plating bath of claim 1 wherein the alkali metal aluminum hydride is lithium aluminum hydride.
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) | 1982-03-19 | 1982-09-18 | 1983-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-19 | 1986-09-18 | 1987-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-19 | 1990-09-18 | 1991-03-20 | $7700.00 | Window Closed / Lapsed |