US2553064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surfacing and cleaning aluminum
Assignee: —
•
Filing: —
•
Granted: 1951-05-15
•
Expires: 1968-05-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:11
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/02; C11D7/04; C11D7/06; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/32; C23F1/36; C23F1/46; C23G; C23G1/00; C23G1/14; C23G1/22; C11D2111/00; C11D2111/10; C11D2111/14; C11D2111/16; C11D2111/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
THE METHOD OF SURFACING AND CLEANSING ALUMINUM BAKE PANS WHICH COMPRISES SUBJECTING SUCH PANS TO THE ACTION OF A SOLUTION OF SODIUM BISULFATE OF A CONCENTRATION OF FROM ABOUT 5% TO ABOUT 20% AT TEMPERATURES OF FROM ABOUT 150* F. TO THE BOILING POINT OF THE SOLUTION.
Claim 2
Independent Claim
47 words
THE METHOD OF SURFACING AND CLEANSING ALUMINUM BAKE PANS WHICH COMPRISES SUBJECTING SUCH PANS TO THE ACTION OF A SOLUTION OF SODIUM BISULFATE OF A CONCENTRATION OF FROM ABOUT 5% TO ABOUT 20% AT TEMPERATURES OF FROM ABOUT 150* F. TO THE BOILING POINT OF THE SOLUTION.
References Cited (Backward Citations)
US2018388A
Cited
US2470593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |