US2985551A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and means for heat processing metal in an inert atmosphere
Assignee: Superweld Corp
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Filing: 1957-07-15
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Granted: 1961-05-23
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Expires: 1977-07-15
Abstract
No abstract record available.
Inventors
- 👤 Hoyt H Todd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:06
CPC Classifications
C; C21; C21D; C21D1/00; C21D1/74; C22; C22F; C22F1/00; C22F1/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
77 words
IN THE HEAT PROCESSING OF METAL IN AN INERT ATMOSPHERE, WHEREIN THE METAL IS PLACED IN A CONTAINER OF HEAT-RESISTING MATERIAL FILLED WITH A NONOXIDIZING GASEOUS FLUID FROM A SUPPLY SOURCE AND THE CONTAINER IS HEATED FOR HEAT PROCESSING OF THE METAL THEREIN WITH CONSEQUENT EXPANSION OF GASEOUS FLUID AND THEN IS COOLED WITH CONSEQUENT CONTRACTION OF THE CONFINED GASEOUS FLUID, THE IMPROVEMENT WHICH CONSISTS IN USING THE FLUID-FILLED CONTAINER COMPLETELY DISCONNECTED FROM SAID SOURCE IN UN-
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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) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |