US2494909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating copper, brass, terneplate, magnesium, zinciferous and ferriferous metals
Assignee: Henkel Corp
•
Filing: 1947-02-28
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Granted: 1950-01-17
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Expires: 1967-02-28
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank Palin Spruance
- 👤 James H Thirsk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:50
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34; C23C22/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
39 words
A PROCESS FOR COATING COPPER, BRASS, TERNEPLATE, MAGNESIUM, ZINCIFEROUS AND FERRIFEROUS SURFACES WHICH CONSISTS IN TREATING THE SURFACE WITH AN ACID AQUEOUS SOLUTION UNTIL A COATING IS FORMED; THEESSENTIAL, ACTIVE COATING-PRODUCING INGREDIENTS OF WHICH SOLUTION ARE FLUORIDE, DICHROMATE, AR-
Claim 2
Dependent Claim
39 words
A PROCESS FOR COATING COPPER, BRASS, TERNEPLATE, MAGNESIUM, ZINCIFEROUS AND FERRIFEROUS SURFACES WHICH CONSISTS IN TREATING THE SURFACE WITH AN ACID AQUEOUS SOLUTION UNTIL A COATING IS FORMED; THEESSENTIAL, ACTIVE COATING-PRODUCING INGREDIENTS OF WHICH SOLUTION ARE FLUORIDE, DICHROMATE, AR-
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US2066181A
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US2114151A
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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) | 1953-01-16 | 1953-07-18 | 1954-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-16 | 1957-07-18 | 1958-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-16 | 1961-07-18 | 1962-01-17 | $7700.00 | Window Closed / Lapsed |