US3663327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formulation and method for brightening aluminum
Assignee: Chemed Corp
•
Filing: 1969-08-13
•
Granted: 1972-05-16
•
Expires: 1989-08-13
Abstract
Abstract The present invention is directed to an aluminum brightener formulation which includes water, phosphoric acid, a transition metal compound and a wetting agent. Aluminum may be brightened by a method which includes the step of spraying or brushing an aluminum surface with the present formulation at a moderate temperature.
Inventors
- 👤 Jack Henry Ritzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:32
CPC Classifications
C; C23; C23F; C23F3/00; C23F3/02; C23F3/03
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
GB403373A
Cited
GB625834A
Cited
FR967207A
Cited
US2760891A
Cited
US3004056A
Cited
US3194704A
Cited
US3240633A
Cited
GB1088287A
Cited
US3448055A
Cited
US3301787A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |