US2542637A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of rectifying a neutral salt heat-treating bath
Assignee: Motors Liquidation Co
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Filing: 1946-05-10
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Granted: 1951-02-20
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Expires: 1966-05-10
Abstract
No abstract record available.
Inventors
- 👤 Poy Stewart M De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:59
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/34; C21D1/44; C21D1/46
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
THE STEPS IN THE METHOD OF RECTIFYING A HEAT TREATING BATH WHICH WILL NORMALLY DECARBURIZE THE STEEL BEING HEAT TREATED THEREIN, COMPRISING PROVIDING A MOLTEN SALT BATH WHICH IS HEATED BY METAL ELECTRODES IMMERSED THEREIN, IMMERSING A SOLID GRAPHITE SCAVENGING ROD IN AID SALT BATH FOR REDUCING METAL OXIDES THEREIN DURING THE HEAT TREATING PROCESS AND FOR COLLECTING METALS THEREON, AND PERIODICALLY REMOVING SAID SCAVENGING ROD FROM THE BATH AND CLEANING THE METALS THEREFROM AND THEN REPLACING THE CLEANED ROD IN THE BATH.
Claim 2
Dependent Claim
83 words
THE STEPS IN THE METHOD OF RECTIFYING A HEAT TREATING BATH WHICH WILL NORMALLY DECARBURIZE THE STEEL BEING HEAT TREATED THEREIN, COMPRISING PROVIDING A MOLTEN SALT BATH WHICH IS HEATED BY METAL ELECTRODES IMMERSED THEREIN, IMMERSING A SOLID GRAPHITE SCAVENGING ROD IN AID SALT BATH FOR REDUCING METAL OXIDES THEREIN DURING THE HEAT TREATING PROCESS AND FOR COLLECTING METALS THEREON, AND PERIODICALLY REMOVING SAID SCAVENGING ROD FROM THE BATH AND CLEANING THE METALS THEREFROM AND THEN REPLACING THE CLEANED ROD IN THE BATH.
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) | 1954-02-19 | 1954-08-21 | 1955-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-19 | 1958-08-21 | 1959-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-19 | 1962-08-21 | 1963-02-20 | $7700.00 | Window Closed / Lapsed |