US3467589A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a copper containing protective coating prior to electrodeposition of paint
Assignee: Henkel Corp
•
Filing: 1966-10-19
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Granted: 1969-09-16
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Expires: 1986-10-19
Abstract
No abstract record available.
Inventors
- 👤 Werner Rausch
- 👤 Hans Hansen
- 👤 Gerhard Mueller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:11
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/08; C23C22/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A METHOD FOR FORMING A PROTECTIVE COATING ON A FERROUS METAL SURFACE WHICH COMPRISES CONTACTING SAID SURFACE WITH AN ACIDIC ZINC PHOSPHATE COATING SOLUTION CONTAINING FROM ABOUT 3 TO 200 MILLIGRAMS PER LITER OF CU++ FOR A PERIOD SUFFICIENT TO FORM A ZINC PHOSPHATE COATING CONTAINING METALLIC COPPER ON THE SURFACE AND, THEREAFTER, ELECTROPHORETICALLY DEPOSITING A PAINT ON THE THUS-COATED SURFACE.
Claim 2
Independent Claim
61 words
A METHOD FOR FORMING A PROTECTIVE COATING ON A FERROUS METAL SURFACE WHICH COMPRISES CONTACTING SAID SURFACE WITH AN ACIDIC ZINC PHOSPHATE COATING SOLUTION CONTAINING FROM ABOUT 3 TO 200 MILLIGRAMS PER LITER OF CU++ FOR A PERIOD SUFFICIENT TO FORM A ZINC PHOSPHATE COATING CONTAINING METALLIC COPPER ON THE SURFACE AND, THEREAFTER, ELECTROPHORETICALLY DEPOSITING A PAINT ON THE THUS-COATED SURFACE.
References Cited (Backward Citations)
US1949090A
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US2001754A
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GB517049A
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US2554139A
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US2813812A
Cited
US2873709A
Cited
US3116178A
Cited
US3109757A
Cited
US3230162A
Cited
US3333988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-15 | 1973-03-17 | 1973-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-15 | 1977-03-17 | 1977-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-15 | 1981-03-17 | 1981-09-16 | $7700.00 | Window Closed / Lapsed |