US2585613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of heat-treating electrical resistance alloy
Assignee: Wilbur B Driver Co
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Filing: 1949-08-16
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Granted: 1952-02-12
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Expires: 1969-08-16
Abstract
No abstract record available.
Inventors
- 👤 Victor O Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:35
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/058
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
THE METHOD OF TREATING A WIRE COMPRISED OF AN ALLOY CONSISTING OF 10 TO 30% CR, BALANCE NI, TO IMPART THERETO A TEMPERATURE COEFFICIENT WITHIN THE RANGE 20 TO 300* C. OF LESS THAN .0001 OHM AND AN ELECTRICAL RESISTANCE ABOVE 650 OHMS WHICH COMPRISES HEAT TREATING THE WIRE IN A REDUCING ATMOSPHERE FOR FROM 1 TO 5 HOURS AT A TEMPERATURE WITHIN THE RANGE 780-1000* F. AND COOLING THE HEAT-TREATED PRODUCT SLOWLY DOWN TO ATMOSPHERIC TEMPERATURES.
Claim 2
Independent Claim
77 words
THE METHOD OF TREATING A WIRE COMPRISED OF AN ALLOY CONSISTING OF 10 TO 30% CR, BALANCE NI, TO IMPART THERETO A TEMPERATURE COEFFICIENT WITHIN THE RANGE 20 TO 300* C. OF LESS THAN .0001 OHM AND AN ELECTRICAL RESISTANCE ABOVE 650 OHMS WHICH COMPRISES HEAT TREATING THE WIRE IN A REDUCING ATMOSPHERE FOR FROM 1 TO 5 HOURS AT A TEMPERATURE WITHIN THE RANGE 780-1000* F. AND COOLING THE HEAT-TREATED PRODUCT SLOWLY DOWN TO ATMOSPHERIC TEMPERATURES.
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) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |