US3468774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic descaling of titanium and its alloys
Assignee: Rohr Inc
•
Filing: 1966-12-09
•
Granted: 1969-09-23
•
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 22:15
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.
References Cited (Backward Citations)
US2780594A
Cited
US2936270A
Cited
US2979553A
Cited
US3030286A
Cited
US3048528A
Cited
US3190822A
Cited
US3180807A
Cited
US3239440A
Cited
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 |