Patent US2935431A successfully refreshed from Google Patents.
US2935431A
Expired / Lapsed
US
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Method of coating titanium
Assignee: Imperial Chemical Industries Ltd
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Filing: 1954-06-03
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Granted: 1960-05-03
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Expires: 1974-06-03
Abstract
No abstract record available.
Inventors
- 👤 Shaw Richard Elliott
- 👤 Ness Norman Morin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:17
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PROCESS IN WHICH A CONTINUOUS, CLOSELY ADHERENT, CRYSTALLINE COATING IS FORMED ON A TITANIUM SURFACE BY TREATING THE SAID SURFACE WITH AN AQUEOUS ACIDIC SOLUTION CONSISTING ESSENTIALLY OF FERRIC, OXALATE AND FLUORIDE IONS IN AMOUNTS SUFFICIENT TO FORM SAID CONTINUOUS, CLOSELY ADHERENT, CRYSTALLINE COATING, SAID AMOUNTS BEING, BY WEIGHT, WITHIN THE RANGE OF FROM 0.15% TO 2.6% FERRIC ION, 1.77% TO 4.1% OXALATE ION, AND 0.4% TO 3.3% FLUORIDE ION.
Claim 2
Dependent Claim
71 words
A PROCESS IN WHICH A CONTINUOUS, CLOSELY ADHERENT, CRYSTALLINE COATING IS FORMED ON A TITANIUM SURFACE BY TREATING THE SAID SURFACE WITH AN AQUEOUS ACIDIC SOLUTION CONSISTING ESSENTIALLY OF FERRIC, OXALATE AND FLUORIDE IONS IN AMOUNTS SUFFICIENT TO FORM SAID CONTINUOUS, CLOSELY ADHERENT, CRYSTALLINE COATING, SAID AMOUNTS BEING, BY WEIGHT, WITHIN THE RANGE OF FROM 0.15% TO 2.6% FERRIC ION, 1.77% TO 4.1% OXALATE ION, AND 0.4% TO 3.3% FLUORIDE ION.
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) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |