Patent US3468774A successfully refreshed from Google Patents.
US3468774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic descaling of titanium and its alloys
Assignee: Rohr Inc
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Filing: 1966-12-09
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Granted: 1969-09-23
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Expires: 1986-12-09
Abstract
No abstract record available.
Inventors
- 👤 Earl W Kendall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:28
CPC Classifications
C; C25; C25F; C25F1/00; C25F1/02; C25F1/04; C25F1/08; C25D; C25D11/00; C25D11/02; C25D11/04; C25D11/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
THE METHOD OF DESCALING AN ARTICLE FORMED OF TITANIUM AND ITS ALLOYS COMPRISING THE STEPS OF IMMERSING SAID ARTICLE AS AN ANODE IN AN ELECTROLYTIC BATH AND PASSING AN ELECTRIC CURRENT BETWEEN SAID ARTICLE AND A CATHODE, SAID BATH CONSISTING ESSENTIALLY OF HYDROFLUORIC ACID (4850) AND CONCENTRATED SULFURIC DISSOLVED IN GLACIAL ACETIC ACID AS THE CARRIER.
Claim 2
Independent Claim
56 words
THE METHOD OF DESCALING AN ARTICLE FORMED OF TITANIUM AND ITS ALLOYS COMPRISING THE STEPS OF IMMERSING SAID ARTICLE AS AN ANODE IN AN ELECTROLYTIC BATH AND PASSING AN ELECTRIC CURRENT BETWEEN SAID ARTICLE AND A CATHODE, SAID BATH CONSISTING ESSENTIALLY OF HYDROFLUORIC ACID (4850) AND CONCENTRATED SULFURIC DISSOLVED IN GLACIAL ACETIC ACID AS THE CARRIER.
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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) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |