US3002908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of removing filler materials
Assignee: Rolls Royce PLC
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Filing: 1958-08-08
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Granted: 1961-10-03
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Expires: 1978-08-08
Abstract
No abstract record available.
Inventors
- 👤 Hall Douglas Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:59
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/02; C25; C25F; C25F1/00; C25F1/02; C25F1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
A PROCESS OF REMOVING FERROUS METAL FILLER FROM THE INTERIOR OF AN OBJECT MADE OF A NICKEL BASE MATERIAL: COMPRISING THE STEPS OF IMMERSING THE OBJECTING IN A NITRIC ACID ELECTROLYTE, PLACING AN INSOLUBLE ANODE IN THE ELECTROLYTE, AND PASSING AN ELECTRIC CURRENT BETWEEN THE ANODE AND THE OBJECT, WHICH IS MADE CATHODE, THROUGH THE ELECTROLYTE, THE OBJECT AND THE FILLER BEING BOTH EXPOSED TO THE ELECTROLYTE, AND BEING THE CATHODE THROUGHOUT THE PROCESS.
Claim 2
Dependent Claim
74 words
A PROCESS OF REMOVING FERROUS METAL FILLER FROM THE INTERIOR OF AN OBJECT MADE OF A NICKEL BASE MATERIAL: COMPRISING THE STEPS OF IMMERSING THE OBJECTING IN A NITRIC ACID ELECTROLYTE, PLACING AN INSOLUBLE ANODE IN THE ELECTROLYTE, AND PASSING AN ELECTRIC CURRENT BETWEEN THE ANODE AND THE OBJECT, WHICH IS MADE CATHODE, THROUGH THE ELECTROLYTE, THE OBJECT AND THE FILLER BEING BOTH EXPOSED TO THE ELECTROLYTE, AND BEING THE CATHODE THROUGHOUT THE PROCESS.
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) | 1964-10-02 | 1965-04-03 | 1965-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-02 | 1969-04-03 | 1969-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-02 | 1973-04-03 | 1973-10-03 | $7700.00 | Window Closed / Lapsed |