US2998358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a colored film on an aluminum alloy
Assignee: Nippon Light Metal Co Ltd
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Filing: 1958-09-24
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Granted: 1961-08-29
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Expires: 1978-09-24
Abstract
No abstract record available.
Inventors
- 👤 Nakayama Takakado
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:33
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
THE METHOD OF PRODUCING A DEEP COLORED FILM ON THE SURFACE OF AN ALUMINUM ALLOY, WHICH CONSISTS OF THE STEPS OF THERMALLY TREATING THE ALLOY BELOW THE HOT WORKING TEMPERATURE AND WITHIN THE RANGE OF 150C. TO 400* C., THEREUPON WORKING THE ALLOY AT A TEMPERATURE BELOW THE HOT WORKING TEMPERATURE AND WITHIN THE AFOREMENTIONED RANGE, SAID ALLOY CONTAINING AN ADDITIVE METAL IN A QUANTITY GREATER THAN ITS SOLUBILITY MAXIMUM IN ALUMINUM AT SAID GIVEN TEMPERATURE AT WHICH SAID WORKING IS MADE, THEN ANODIZING THE ALLOY WITH A CURRENT DENSITY LARGER THAN 0.8 AMPERE PER DM.2.
References Cited (Backward Citations)
US2262696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |