US2888388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing of dyed anodized aluminum
Assignee: Sandoz AG
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Filing: 1957-08-26
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Granted: 1959-05-26
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Expires: 1977-08-26
Abstract
No abstract record available.
Inventors
- 👤 Frank P Stiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:26
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/18; C25D11/24; C25D11/246; B; B41; B41M; B41M5/00; B41M5/025; B41M5/035; B41M5/0351
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
IN THE SEALING OF DYED ANODICALLY OXIDIZED ALUMINUM BY MEANS OF A HYDROLYZABLE METALLIC SALT IN AN AQUEOUS BATH, THE IMPROVEMENT WHICH CONSISTS OF CARRYING OUT THE SEALING OPERATION IN THE PRESENCE IN THE BATH OF AT LEAST 0.1% BY WEIGHT OF, AS SOLE SULFONATE ADDITAMENT, A COMPOUND CONTAINING THE LIGNOSULFONATE RADICAL, WHEREBY A SMUT-FREE PRODUCT WHICH REQUIRES NO MECHANICAL AFTERTREATMENT IS OBTAINED.
Claim 2
Dependent Claim
63 words
IN THE SEALING OF DYED ANODICALLY OXIDIZED ALUMINUM BY MEANS OF A HYDROLYZABLE METALLIC SALT IN AN AQUEOUS BATH, THE IMPROVEMENT WHICH CONSISTS OF CARRYING OUT THE SEALING OPERATION IN THE PRESENCE IN THE BATH OF AT LEAST 0.1% BY WEIGHT OF, AS SOLE SULFONATE ADDITAMENT, A COMPOUND CONTAINING THE LIGNOSULFONATE RADICAL, WHEREBY A SMUT-FREE PRODUCT WHICH REQUIRES NO MECHANICAL AFTERTREATMENT IS OBTAINED.
References Cited (Backward Citations)
US2312097A
Cited
US2755239A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-25 | 1962-11-24 | 1963-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-25 | 1966-11-24 | 1967-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-25 | 1970-11-24 | 1971-05-26 | $7700.00 | Window Closed / Lapsed |