US3203793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Porous columbium and tantalum materials
Assignee: EIDP Inc
•
Filing: 1963-01-28
•
Granted: 1965-08-31
•
Expires: 1983-01-28
Abstract
No abstract record available.
Inventors
- 👤 Robert B Hand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:38
CPC Classifications
H; H01; H01G; H01G9/00; H01G9/004; H01G9/04; H01G9/048; H01G9/052; C; C22; C22C; C22C1/00; C22C1/08; C23; C23F; C23F4/00; C23F4/02; C25; C25D; C25D11/00; C25D11/02; C25D11/26; B; B22; B22F; B22F2998/00; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12479
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
A POROUS METAL PRODUCT HAVING A ROUGHNESS FACTOR WHICH IS AT LEAST 3 AND REMAINS SUBSTANTIALLY UNCHANGED UPON ANODIZATION OF THE PRODUCT TO 200 V., SAID PRODUCT COMPRISING A POROUS METAL BODY HAVING PORES THEREIN ORIGINATING IN CAVITIES NEAR THE BODY SURFACE, THE CAVITIES OPENING THROUGH CHANNELS TO THE OTHER PERIPHERY OF THE BODY, THE SURFACE OF SAID BODY, INCLUDING THE SURFACE OF THE PORES THEREIN, CONSISTING ESSENTIALLY OF A METAL FROM THE GROUP CONSISTING OF COLUMBIUM, TANTALUM, AND COMBINATION THEREOF, THE PURITY OF SAID SURFACE METAL BEING SUCH THAT WHEN THE BODY IS ANODIZED TO 200 VOLTS AT 25*C. BY ELECTROLYZING IT IN A .01% BY WEIGHT SOLUTION OF ORTHOPHOSPHORIC ACID IN WATER, THE CONCENTRATION OF CONTAMINANTS IN THE ANODIC OXIDE FILM SO FORMED ON ITS SURFACE IS BELOW ABOUT 1% BY WEIGHT, CONSTITUENTS OTHER THAN COLUMBIUM, TANTALUM AND OXYGEN BEING CONSIDERED CONTAMINANTS, AND THERE BEING IN REGIONS OF SAID POROUS BODY AWAY FROM ITS SURFACE, IN ADDITION TO THE METAL OF THE GROUP CONSISTING OF COLUMBIUM, TANTALUM AND COMBINATIONS THEREOF, A METAL OF THE GROUP CONSISTING OF TITANIUM, VANADIUM, AND COMBINATIONS THEREOF.
Claim 2
Dependent Claim
184 words
A POROUS METAL PRODUCT HAVING A ROUGHNESS FACTOR WHICH IS AT LEAST 3 AND REMAINS SUBSTANTIALLY UNCHANGED UPON ANODIZATION OF THE PRODUCT TO 200 V., SAID PRODUCT COMPRISING A POROUS METAL BODY HAVING PORES THEREIN ORIGINATING IN CAVITIES NEAR THE BODY SURFACE, THE CAVITIES OPENING THROUGH CHANNELS TO THE OTHER PERIPHERY OF THE BODY, THE SURFACE OF SAID BODY, INCLUDING THE SURFACE OF THE PORES THEREIN, CONSISTING ESSENTIALLY OF A METAL FROM THE GROUP CONSISTING OF COLUMBIUM, TANTALUM, AND COMBINATION THEREOF, THE PURITY OF SAID SURFACE METAL BEING SUCH THAT WHEN THE BODY IS ANODIZED TO 200 VOLTS AT 25*C. BY ELECTROLYZING IT IN A .01% BY WEIGHT SOLUTION OF ORTHOPHOSPHORIC ACID IN WATER, THE CONCENTRATION OF CONTAMINANTS IN THE ANODIC OXIDE FILM SO FORMED ON ITS SURFACE IS BELOW ABOUT 1% BY WEIGHT, CONSTITUENTS OTHER THAN COLUMBIUM, TANTALUM AND OXYGEN BEING CONSIDERED CONTAMINANTS, AND THERE BEING IN REGIONS OF SAID POROUS BODY AWAY FROM ITS SURFACE, IN ADDITION TO THE METAL OF THE GROUP CONSISTING OF COLUMBIUM, TANTALUM AND COMBINATIONS THEREOF, A METAL OF THE GROUP CONSISTING OF TITANIUM, VANADIUM, AND COMBINATIONS THEREOF.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-08-30 | 1969-03-01 | 1969-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-30 | 1973-03-01 | 1973-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-30 | 1977-03-01 | 1977-08-31 | $7700.00 | Window Closed / Lapsed |