US3030286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Descaling titanium and titanium base alloy articles
Assignee: Titanium Metals Corp
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Filing: 1958-11-21
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Granted: 1962-04-17
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Expires: 1978-11-21
Abstract
No abstract record available.
Inventors
- 👤 Luh C Tao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:26
CPC Classifications
C; C25; C25F; C25F1/00; C25F1/02; C25F1/04; C25F1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A METHOD FOR DESCALING THE SURFACE OF AN ARTICLE OF METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM AND TITANIUM BASE ALLOYS WHICH COMPRISES: IMMERSING AND MAINTAINING SAID ARTICLE AS AN ANODE IN A SULFURIC ACID ELECTROLYTE OF CONCENTRATION MORE THAN 1% H2SO4 BY VOLUME, MEANWHILE PASSING ELECTRIC CURRENT AT BETWEEN 3 AND 60 VOLTS BETWEEN SAID ARTICLE AND A CATHODE TO PROVIDE A CURRENT DENSITY OF BETWEEN ABOUT 2 AND ABOUT 100 AMPERES PER SQUARE FOOT OF SAID SURFACE FOR A PERIOD OF AT LEAST ONE MINUTE, AND A TEMPERATURE OF BETWEEN ROOM TEMPERATURE AND THE BOILING POINT OF SAID SURFACE OF THEREBY TO LOOSEN AND REMOVE SCALE FROM SAID SURFACE OF SAID ARTICLE AND TO FORM ON SAID SURFACE AN ANODIC FILM, REMOVING SAID ARTICLE FROM SAID ELECTROLYTE AND REMOVING SAID ANODE FILM FROM SAID SURFACE THEREOF.
Claim 2
Independent Claim
139 words
A METHOD FOR DESCALING THE SURFACE OF AN ARTICLE OF METAL SELECTED FROM THE GROUP CONSISTING OF TITANIUM AND TITANIUM BASE ALLOYS WHICH COMPRISES: IMMERSING AND MAINTAINING SAID ARTICLE AS AN ANODE IN A SULFURIC ACID ELECTROLYTE OF CONCENTRATION MORE THAN 1% H2SO4 BY VOLUME, MEANWHILE PASSING ELECTRIC CURRENT AT BETWEEN 3 AND 60 VOLTS BETWEEN SAID ARTICLE AND A CATHODE TO PROVIDE A CURRENT DENSITY OF BETWEEN ABOUT 2 AND ABOUT 100 AMPERES PER SQUARE FOOT OF SAID SURFACE FOR A PERIOD OF AT LEAST ONE MINUTE, AND A TEMPERATURE OF BETWEEN ROOM TEMPERATURE AND THE BOILING POINT OF SAID SURFACE OF THEREBY TO LOOSEN AND REMOVE SCALE FROM SAID SURFACE OF SAID ARTICLE AND TO FORM ON SAID SURFACE AN ANODIC FILM, REMOVING SAID ARTICLE FROM SAID ELECTROLYTE AND REMOVING SAID ANODE FILM FROM SAID SURFACE THEREOF.
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) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |