Patent US2786002A successfully refreshed from Google Patents.
US2786002A
Expired / Lapsed
US
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Method of treating zinciferous surfaces
Assignee: Henkel Corp
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Filing: 1954-04-28
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Granted: 1957-03-19
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Expires: 1974-04-28
Abstract
No abstract record available.
Inventors
- 👤 Van Leon
- 👤 Douty Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:51
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34; C23C22/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
41 words
THE METHOD OF PASSIVATING A ZINCIFEROUS SURFACE WHICH COMPRISES TREATING IT WITH AN AWUEOUS ACIDULATED SOLUTION CONSISTING ESSENTIALLY OF HEXAVALENT CHROMIUM, CHLORIDE AND COMPLEX FLUORIDE AND WATER, THE SAID INGREDIENTS PER LITER OF SOLUTION BEING PRESENT ACCORDING TO THE FOLLOWING FORMULA:
Claim 2
Independent Claim
41 words
THE METHOD OF PASSIVATING A ZINCIFEROUS SURFACE WHICH COMPRISES TREATING IT WITH AN AWUEOUS ACIDULATED SOLUTION CONSISTING ESSENTIALLY OF HEXAVALENT CHROMIUM, CHLORIDE AND COMPLEX FLUORIDE AND WATER, THE SAID INGREDIENTS PER LITER OF SOLUTION BEING PRESENT ACCORDING TO THE FOLLOWING FORMULA:
References Cited (Backward Citations)
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US2106904A
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US2393943A
Cited
US2494909A
Cited
US2524577A
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US2762731A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-18 | 1960-09-17 | 1961-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-18 | 1964-09-17 | 1965-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-18 | 1968-09-17 | 1969-03-19 | $7700.00 | Window Closed / Lapsed |