US2757221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermocouple element composition
Assignee: Driver Harris Co
•
Filing: 1954-07-06
•
Granted: 1956-07-31
•
Expires: 1974-07-06
Abstract
No abstract record available.
Inventors
- 👤 Guettel Charles Leon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:28
CPC Classifications
H; H10; H10N; H10N10/00; H10N10/80; H10N10/85; H10N10/851; H10N10/854
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
64 words
A THERMOCOUPLE COMPRISING AN ELECTROPOSITIVE ELEMENT COMPOSED OF AN ALLOY OF FROM 18 TO 22% CHROMIUM, UP TO 2% COLUMBIUM, UP TO 2% MANGANESE, 0.5 TO 2% SILICON, 0.01 TO 0.15% CARBON, AND THE BALANCE ESSENTIALLY NICKEL, AND AN ELECTRONEGATIVE ELEMENT COMPOSED OF AN ALLOY CONTAINING APPROXIMATELY 2% TO 4% MANGANESE, APPROXIMATELY 1% TO 3% ALUMINUM, APPROXIMATELY 1% SILICON, AND THE BALANCE ESSENTIALLY NICKEL.
References Cited (Backward Citations)
US2587391A
Cited
US2691690A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-07-31 | 1960-01-30 | 1960-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-07-31 | 1964-01-30 | 1964-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-07-31 | 1968-01-30 | 1968-07-31 | $7700.00 | Window Closed / Lapsed |