US3198672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of cupric oxide surfaces
Assignee: International Protected Metals Inc
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Filing: 1961-07-10
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Granted: 1965-08-03
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Expires: 1981-07-10
Abstract
No abstract record available.
Inventors
- 👤 Hart Harold George De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:11
CPC Classifications
B; B05; B05D; B05D3/00; B05D3/10; C; C23; C23C; C23C22/00; C23C22/05; C23C22/60; C23C22/63; C25; C25D; C25D11/00; C25D11/02; C25D11/34
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
95 words
A COATING PROCESS WHICH COMPRISES PRE-TREATING A SURFACE TO BE COATED HAVING AT LEAST AN OUTER LAYER CONSISTING ESSENTIALLY OF METALLIC COPPER WITH AN AQUEOUS STRONGLY ALKALINE SOLUTION HAVING A PH VALUE OF AT LEAST 12 OF AN ALKALINE METAL CHLORITE OXIDISING AGENT AND FROM 0.007 TO 0.6 GRAM ION OF CYANIDE PER-LITRE UNTIL THE SURFACE HAS ASSUMED A NAPLIKE APPEARANCE OF CUPRIC OXIDE NEEDLES AND STOPPING THE REACTION BEFORE THE COPPER OXIDE NEEDLES HAVE GROWN TO SUCH LENGTHS THA T SUBSTANTIAL MATTING OCCURS, AND BONDING A RESIN COATING COMPOSITION TO THE THUS PRETREATED SURFACE.
References Cited (Backward Citations)
US2077450A
Cited
US2460896A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-02 | 1969-02-01 | 1969-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-02 | 1973-02-01 | 1973-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-02 | 1977-02-01 | 1977-08-03 | $7700.00 | Window Closed / Lapsed |