Patent US4094750A successfully refreshed from Google Patents.
US4094750A
Expired / Lapsed
US
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Cathodic deposition of oxide coatings
Assignee: Northrop Grumman Systems Corp
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Filing: 1977-10-05
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Granted: 1978-06-13
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Expires: 1997-10-05
Abstract
Abstract A process for depositing an oxide layer on a titanium surface in preparation for adhesive bonding, the oxide layer being cathodically deposited in a solution containing isoproponol and a metal salt.
Inventors
- 👤 Jack D. Mackey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:30
CPC Classifications
C; C25; C25D; C25D9/00; C25D9/04; C25D9/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
74 words
A process for depositing a tenaceous, adhesion-promoting oxide coating on the surface of a metal part, comprising: cleaning the surfaces of said part, suspending said part as the cathode in a solution containing isoproponol and a metal salt selected from the group consisting essentially of aluminum nitrate, cupric nitrate, cobalt nitrate, and nickelous nitrate, electrolyzing said part at a current density ranging from 0.02 to 0.5 amp./in. 2 for times ranging from 5-60 seconds.
Claim 2
Dependent Claim
74 words
A process for depositing a tenaceous, adhesion-promoting oxide coating on the surface of a metal part, comprising: cleaning the surfaces of said part, suspending said part as the cathode in a solution containing isoproponol and a metal salt selected from the group consisting essentially of aluminum nitrate, cupric nitrate, cobalt nitrate, and nickelous nitrate, electrolyzing said part at a current density ranging from 0.02 to 0.5 amp./in. 2 for times ranging from 5-60 seconds.
Claim 3
Dependent Claim
13 words
The process in accordance with claim 1 wherein said metal part is titanium.
Claim 4
Dependent Claim
13 words
The process in accordance with claim 1 wherein said metal part is magnesium.
Claim 5
Dependent Claim
12 words
The process in accordance with claim 1 wherein said part is aluminum.
Claim 6
Dependent Claim
13 words
The process in accordance with claim 1 wherein said part is stainless steel.
Claim 7
Dependent Claim
69 words
A process for depositing a tenaceous adhesion-promoting oxide coating on the surface of a graphite-epoxy part, comprising: cleaning the surfaces of said part, suspending said part as the cathode in a solution containing isoproponol and a metal salt selected from the group consisting essentially of aluminum nitrate, cupric nitrate, cobalt nitrate, and nickelous nitrate, and electrolyzing said part at a current density of 0.1 amp./in. 2 for 30 seconds.
Claim 8
Dependent Claim
69 words
A process for depositing a tenaceous adhesion-promoting oxide coating on the surface of a graphite-epoxy part, comprising: cleaning the surfaces of said part, suspending said part as the cathode in a solution containing isoproponol and a metal salt selected from the group consisting essentially of aluminum nitrate, cupric nitrate, cobalt nitrate, and nickelous nitrate, and electrolyzing said part at a current density of 0.1 amp./in. 2 for 30 seconds.
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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) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |