Patent US2813816A successfully refreshed from Google Patents.
US2813816A
Expired / Lapsed
US
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Method of and materials for coating stainless steel and article produced thereby
Assignee: Henkel Corp
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Filing: 1955-05-16
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Granted: 1957-11-19
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Expires: 1975-05-16
Abstract
No abstract record available.
Inventors
- 👤 Otto George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:31
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/46; C23C22/47
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
AN AQUEOUS DILUTE MINERAL ACID METAL-COATING BATH SUBSTANTIALLY FREE OF HALIDE AND CONSISTING ESSENTIALLY OF ACID FROM THE CLASS CONSISTING OF NITRIC, PHOSPHORIC, SULPHURIC, SULPHAMIC AND SULFUROUS ACIDS; MANGANESE OXALATE; AND A SULPHUR-BEARING COMPOUND FROM THE CLASS WHICH CONTAINS OXYGEN AND WILL YIELD SULPHUR DIOXIDE (SO2) ANDND SULPHUR UPON DECOMPOSITION IN ACID SOLUTION; THE QUANTITYY OF MANGANESE OZALATE IN THE BATH BEING BETWEEN 1 AND 18 GRAMS PER LITER, THE QUANTITY OF THE SULPHUR COMPOUNDD BEING SUCH THAT A 10 ML. SAMPLE OF THE BATH WILL REACT WITH AT LEAST 4 ML. OF 0.5 NORMAL IODINE SOLUTION, USINGG STARCH INDICATOR, TO A BLUE ENDPOINT, AND THE AMOUNT OF FREE ACIDITY BEING SUCH AS TO YIELDA PH OF FROM 0.7 TO 2.
Claim 2
Dependent Claim
121 words
AN AQUEOUS DILUTE MINERAL ACID METAL-COATING BATH SUBSTANTIALLY FREE OF HALIDE AND CONSISTING ESSENTIALLY OF ACID FROM THE CLASS CONSISTING OF NITRIC, PHOSPHORIC, SULPHURIC, SULPHAMIC AND SULFUROUS ACIDS; MANGANESE OXALATE; AND A SULPHUR-BEARING COMPOUND FROM THE CLASS WHICH CONTAINS OXYGEN AND WILL YIELD SULPHUR DIOXIDE (SO2) ANDND SULPHUR UPON DECOMPOSITION IN ACID SOLUTION; THE QUANTITYY OF MANGANESE OZALATE IN THE BATH BEING BETWEEN 1 AND 18 GRAMS PER LITER, THE QUANTITY OF THE SULPHUR COMPOUNDD BEING SUCH THAT A 10 ML. SAMPLE OF THE BATH WILL REACT WITH AT LEAST 4 ML. OF 0.5 NORMAL IODINE SOLUTION, USINGG STARCH INDICATOR, TO A BLUE ENDPOINT, AND THE AMOUNT OF FREE ACIDITY BEING SUCH AS TO YIELDA PH OF FROM 0.7 TO 2.
References Cited (Backward Citations)
US1911537A
Cited
US1895568A
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US2077450A
Cited
US2577887A
Cited
GB683954A
Cited
FR1065191A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |