US2538317A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of aluminum sheets
Assignee: Reynolds Metals Co
•
Filing: 1945-12-28
•
Granted: 1951-01-16
•
Expires: 1965-12-28
Abstract
No abstract record available.
Inventors
- 👤 James F Mason
- 👤 Frederick H Hesch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:42
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN THE FORMATION OF ANODIC COATINGS ON SHEET ALUMINUM, THE IMPROVEMENT WHICH COMPRISES CONTINUOUSLY ROLLING TWO SUPERPOSED SHEETS OF ALUMINUM TO REDUCE THE THICKNESS THEREOF AND FORM ON EACH SHEET A GLOSS FINISH ON THE SIDES WHICH CONTACTED THE ROLLS AND A MATTE FINISH ON THE SIDES WHICH CONTACTED EACH OTHER, THEN SEALING THE EDGES OF THE TWO CONTACTING SHEETS BY APPLYING CEMENT THERETO, AND THEN PASSING THE SHEETS THROUGH AN ANODIZING TREATMENT TO FORM ON THE GLOSS SURFACES AN ANODIC FILM, AND THEN SEPARATING THE TWO SHEETS EACH OF WHICH HAS AN ANODIC COATING AND A MATTE SURFACE.
Claim 2
Dependent Claim
99 words
IN THE FORMATION OF ANODIC COATINGS ON SHEET ALUMINUM, THE IMPROVEMENT WHICH COMPRISES CONTINUOUSLY ROLLING TWO SUPERPOSED SHEETS OF ALUMINUM TO REDUCE THE THICKNESS THEREOF AND FORM ON EACH SHEET A GLOSS FINISH ON THE SIDES WHICH CONTACTED THE ROLLS AND A MATTE FINISH ON THE SIDES WHICH CONTACTED EACH OTHER, THEN SEALING THE EDGES OF THE TWO CONTACTING SHEETS BY APPLYING CEMENT THERETO, AND THEN PASSING THE SHEETS THROUGH AN ANODIZING TREATMENT TO FORM ON THE GLOSS SURFACES AN ANODIC FILM, AND THEN SEPARATING THE TWO SHEETS EACH OF WHICH HAS AN ANODIC COATING AND A MATTE SURFACE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-01-15 | 1954-07-17 | 1955-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-01-15 | 1958-07-17 | 1959-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-01-15 | 1962-07-17 | 1963-01-16 | $7700.00 | Window Closed / Lapsed |