US2804407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for descaling titanium
Assignee: Rohr Inc
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Filing: 1955-09-06
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Granted: 1957-08-27
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Expires: 1975-09-06
Abstract
No abstract record available.
Inventors
- 👤 Wilfred J Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:50
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/14; C23G1/20; C23G1/205; C23C; C23C22/00; C23C22/73; C23C22/74
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
THE METHOD OF FORMING A THIN SHEET OF TITANIUM TO THE SHAPE OF A CURVED DIE FACE WHICH COMPRISES THE STEPS OF WETTING THE ENTIRE SHEET WITH AN AQUEOUS SOLUTION CONSISTING ESSENTIALLY OF SODIUM NITRATE ABOUT 40 PERCENT, SODIUM CARBONATE ABOUT 2 TO 3 PERCENT, BALANCE WATER, DRYING THE WETTED SHEET TO PROVIDE DA THIN DRY SURFACE FILM THEREON; HEATING THE TREATED SHEET TO A TEMPERATURE WITHIN THE RANGE OF 400* TO 1200*F. TO PROVIDE A THIN SURFACE COATING OF THE LOWER OXIDES OF TITANIUM THEREON; AND PRESSING THE HOT COATED SHEET AGAINST SAID DIE FACE.
References Cited (Backward Citations)
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Cited
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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) | 1960-08-26 | 1961-02-25 | 1961-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-26 | 1965-02-25 | 1965-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-26 | 1969-02-25 | 1969-08-27 | $7700.00 | Window Closed / Lapsed |