US2927872A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyeing of aluminum oxide coatings
Assignee: SAMUEL L COHN
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Filing: 1957-12-19
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Granted: 1960-03-08
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Expires: 1977-12-19
Abstract
No abstract record available.
Inventors
- 👤 Charles C Cohn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 03:20
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/18; C25D11/24; C25D11/243
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
THE METHOD OF PRODUCING COLORED OXIDE COATINGS ON ALUMINUM AND ALUMINUM ALLOYS COMPRISING ABSORBING IN SUCH OXIDE COATING AN AQUEOUS SOLUTION CONTAINING A MINIMUM OF 0.040 GRAM PER LITER OF A HYDROLYZABLE SALT OF A WEAK METALLIC BASE AND AN ANTHRAQUINONE DYE OF THE GROUP CONSISTING OF ANTHRAQUINONE DYES OF THE MORDANT TYPE, MORDANT ACID TYPE, ACID TYPE AND METALLIZABLE TYPE, FOLLOWED BY SEALING OF THE DYED COATING BY TREATMENT WITH AN AQUEOUS SOLUTION CONTAINING A MINIMUM OF 0.040 GRAM PER LITER OF A HYDROLYZABLE SALT OF A WEAK METALLIC BASE.
Claim 2
Independent Claim
91 words
THE METHOD OF PRODUCING COLORED OXIDE COATINGS ON ALUMINUM AND ALUMINUM ALLOYS COMPRISING ABSORBING IN SUCH OXIDE COATING AN AQUEOUS SOLUTION CONTAINING A MINIMUM OF 0.040 GRAM PER LITER OF A HYDROLYZABLE SALT OF A WEAK METALLIC BASE AND AN ANTHRAQUINONE DYE OF THE GROUP CONSISTING OF ANTHRAQUINONE DYES OF THE MORDANT TYPE, MORDANT ACID TYPE, ACID TYPE AND METALLIZABLE TYPE, FOLLOWED BY SEALING OF THE DYED COATING BY TREATMENT WITH AN AQUEOUS SOLUTION CONTAINING A MINIMUM OF 0.040 GRAM PER LITER OF A HYDROLYZABLE SALT OF A WEAK METALLIC BASE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |