US2859144A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and composition for protectively coating aluminum and aluminum alloys
Assignee: Poor and Co
•
Filing: 1954-08-27
•
Granted: 1958-11-04
•
Expires: 1974-08-27
Abstract
No abstract record available.
Inventors
- 👤 Bruno R Jeremias
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:45
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34; C23C22/37
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
94 words
A COATING COMPOSITION FOR ALUMINUM AND ALUMINUM ALLOYS CONSISTING ESSENTIALLY OF SODIUM DICHROMATE, CHROMIC ACID, FLUOBORIC ACID AND AMMONIUM CHLORIDE DISSOLVED IN WATER AT A PH WITHIN THE RANGE OF 1.6 TO 2.1, THE WEIGHT RATIO OF CHROMIUM IN THE DICHROMATE TO CHROMIUM IN THE CHROMIC ACID BEING WITHIN THE RANGE OF 10:1 TO 1:4, THE MOL RATIO OF HBF4 TO CRO3 BEING WITHIN THE RANGE OF 1:2 TO 1:3, AND THE QUANTITY OF AMMONIUM CHLORIDE BEING WITHIN THE RANGE OF 4% TO 32% OF THE TOTAL WEIGHT OF FLUOBORIC ACID AND AMMONIUM CHLORIDE.
References Cited (Backward Citations)
US2114151A
Cited
US2210850A
Cited
US2428749A
Cited
US2678291A
Cited
US2507956A
Cited
US2613165A
Cited
US2655439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-11-03 | 1962-05-05 | 1962-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-11-03 | 1966-05-05 | 1966-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-11-03 | 1970-05-05 | 1970-11-04 | $7700.00 | Window Closed / Lapsed |