US2854371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and solution for treatment of magnesium articles
Assignee: Shwayder Brothers Inc
•
Filing: 1956-02-01
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Granted: 1958-09-30
•
Expires: 1976-02-01
Abstract
No abstract record available.
Inventors
- 👤 Schjelderup Signe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:36
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A SOLUTION FOR TREATING ARTICLES FORMED OF MAGNESIUM AND MAGNESIUM ALLOYS, COMPRISING WATER; A CHROMATE ION REAGENT IN THE PROPORTIONS OF 20 GRAMS TO 170 GRAMS CRO3 PER GALLON OF WATER; BARIUM NITRATE PRESENT IN EXCESS OF SOLUBILITY; AND A STRONG ACID IN SUFFICIENT AMOUNT OF CAUSE THE PH TO BE BETWEEN 0.9 AND 2.5.
Claim 2
Dependent Claim
55 words
A SOLUTION FOR TREATING ARTICLES FORMED OF MAGNESIUM AND MAGNESIUM ALLOYS, COMPRISING WATER; A CHROMATE ION REAGENT IN THE PROPORTIONS OF 20 GRAMS TO 170 GRAMS CRO3 PER GALLON OF WATER; BARIUM NITRATE PRESENT IN EXCESS OF SOLUBILITY; AND A STRONG ACID IN SUFFICIENT AMOUNT OF CAUSE THE PH TO BE BETWEEN 0.9 AND 2.5.
References Cited (Backward Citations)
US1480869A
Cited
US2428749A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |