Patent US3202550A successfully refreshed from Google Patents.
US3202550A
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Process for dyeing aluminum oxide layers
Assignee: Durand and Huguenin AG
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Filing: 1962-08-13
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Granted: 1965-08-24
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Expires: 1982-08-13
Abstract
No abstract record available.
Inventors
- 👤 Grossmann Hans
- 👤 Keller Heinz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:16
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/18; C25D11/24; C25D11/243; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/3804; C07F9/3808; C07F9/3834; C07F9/66; C07F9/70; C07F9/72; C07F9/74; C07F9/90; C07F9/92; C09; C09B; C09B1/00; C09B1/16; C09B1/20; C09B1/26; C09B1/28; C09B1/30; C09B1/303; C09B11/00; C09B11/04; C09B11/10; C09B11/24; C09B31/00; C09B31/02; C09B31/08; C09B33/00; C09B33/02; C09B33/08; C09B33/10; C09B35/00; C09B35/02; C09B35/021; C09B35/023; C09B35/38; C09B35/44; C09B35/46; C09B35/461; C09B43/00; C09B43/11; C09B47/00; C09B47/04; C09B47/08; C09B47/24; C09B47/26; C09B51/00; C09B56/00; C09B56/12; C09B67/00; C09B67/0032; C09B69/00; C09B69/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
46 words
A PROCESS FOR THE DYEING OF ALUMINUM OXIDE LAYERS ON A METALLIC BASE MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND ALUMINUM CONTAINING ALLOYS WHICH COMPRISES CONTACTING THE SAID OXIDE LAYER WITH AN ORGANIC DYESTUFF WHICH CONTAINS AT LEAST ONE SUBSTITUENT GROUP OF THE FORMULA
Claim 2
Dependent Claim
46 words
A PROCESS FOR THE DYEING OF ALUMINUM OXIDE LAYERS ON A METALLIC BASE MATERIAL SELECTED FROM THE GROUP CONSISTING OF ALUMINUM AND ALUMINUM CONTAINING ALLOYS WHICH COMPRISES CONTACTING THE SAID OXIDE LAYER WITH AN ORGANIC DYESTUFF WHICH CONTAINS AT LEAST ONE SUBSTITUENT GROUP OF THE FORMULA
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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |