US2658844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of carburizing
Assignee: RCA Corp
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Filing: 1952-08-30
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Granted: 1953-11-10
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Expires: 1972-08-30
Abstract
No abstract record available.
Inventors
- 👤 Willis E Harbaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:40
CPC Classifications
C; C23; C23C; C23C8/00; C23C8/06; C23C8/08; C23C8/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
THE PROCESS OF CARBURIZING A THORIATED TUNGSTEN ELEMENT, COMPRISING HEATING THE THORIATED TUNGSTEN ELEMENT IN A CARBURIZING ATMOSPHERE CONTAINING INERT GAS AND HYDROCARBON VAPOR AT SUFFICIENTLY HIGH TEMPERATURE TO DECOMPOSE THE HYDROCARBON, AND THEM CONTINUING THE HEATING OF THE THORIATED TUNGSTEN ELEMENT AT A HIGHER TEMPERATURE IN AN ATMOSPHERE IN WHICH THE HYDROCARBON CONTENT IS RAPIDLY DECREASING.
Claim 2
Dependent Claim
57 words
THE PROCESS OF CARBURIZING A THORIATED TUNGSTEN ELEMENT, COMPRISING HEATING THE THORIATED TUNGSTEN ELEMENT IN A CARBURIZING ATMOSPHERE CONTAINING INERT GAS AND HYDROCARBON VAPOR AT SUFFICIENTLY HIGH TEMPERATURE TO DECOMPOSE THE HYDROCARBON, AND THEM CONTINUING THE HEATING OF THE THORIATED TUNGSTEN ELEMENT AT A HIGHER TEMPERATURE IN AN ATMOSPHERE IN WHICH THE HYDROCARBON CONTENT IS RAPIDLY DECREASING.
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) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |