Patent US2678291A successfully refreshed from Google Patents.
US2678291A
Expired / Lapsed
US
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Method of and materials for producing coated aluminum
Assignee: Henkel Corp
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Filing: 1950-09-14
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Granted: 1954-05-11
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Expires: 1970-09-14
Abstract
No abstract record available.
Inventors
- 👤 Jr Frank Palin Spruance
- 👤 Jr Nelson James Newhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:13
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34; C23C22/37; C23C22/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A PROCESS FOR COATING ALUMINUM, THE STEP WITHIN CONSISTS IN TREATING THE SURFACE WITH AN ACID AQUEOUS SOLUTION THE ESSENTIAL ACTIVE COATING PRODUCING INGREDIENTS OF WHICH ARE FLUORIDE IONS, DICHROMATE IONS, FROM THE CLASS OF ARSENATE AND PHOSPHATE IONS, AND IONS FROM THE CLASS OF CHLORIDE AND SULPHATE IONS, THE IONS BEING PRESENT IN AMOUNTS STOICHIOMETRICALLY EQUIVALENT TO IONS OF ACIDS FROM THE CLASS CONSISTING OF PHOSPHORIC AND ARSENIC IONS FROM THE CLASS CONSITING OF CHLORIDES AND SULPHATES (CALCUTHE RATIO OF FLUORIDE ION TO DICHROMATE, EXPRESSED AS F:CRO3, BEING FROM 0.015 TO 0.135; THE PH OF THE SOLUTION BEING FROM ABOUT 1.0 TO 3.2, AS MEASURED BY A GLASS-ELECTRODE PH METER AFTER A NEARLY STEADY READING IS OBTAINED.
Claim 2
Dependent Claim
119 words
IN A PROCESS FOR COATING ALUMINUM, THE STEP WITHIN CONSISTS IN TREATING THE SURFACE WITH AN ACID AQUEOUS SOLUTION THE ESSENTIAL ACTIVE COATING PRODUCING INGREDIENTS OF WHICH ARE FLUORIDE IONS, DICHROMATE IONS, FROM THE CLASS OF ARSENATE AND PHOSPHATE IONS, AND IONS FROM THE CLASS OF CHLORIDE AND SULPHATE IONS, THE IONS BEING PRESENT IN AMOUNTS STOICHIOMETRICALLY EQUIVALENT TO IONS OF ACIDS FROM THE CLASS CONSISTING OF PHOSPHORIC AND ARSENIC IONS FROM THE CLASS CONSITING OF CHLORIDES AND SULPHATES (CALCUTHE RATIO OF FLUORIDE ION TO DICHROMATE, EXPRESSED AS F:CRO3, BEING FROM 0.015 TO 0.135; THE PH OF THE SOLUTION BEING FROM ABOUT 1.0 TO 3.2, AS MEASURED BY A GLASS-ELECTRODE PH METER AFTER A NEARLY STEADY READING IS OBTAINED.
References Cited (Backward Citations)
US2438877A
Cited
US2471909A
Cited
US2472864A
Cited
US2487137A
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US2507956A
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US2494910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-10 | 1957-11-09 | 1958-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-10 | 1961-11-09 | 1962-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-10 | 1965-11-09 | 1966-05-11 | $7700.00 | Window Closed / Lapsed |