US3776781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermocouple with nickel-silicon-magnesium alloy negative element
Assignee: Carpenter Technology Corp
•
Filing: 1973-04-12
•
Granted: 1973-12-04
•
Expires: 1993-04-12
Abstract
Abstract A nickel-base alloy, useful as a negative thermoelement, is disclosed. The alloy consists essentially of from about 3.25 to about 5.0 percent by weight of silicon and from about 0.03 to about 0.25 percent by weight of magnesium and the balance nickel. The new alloy is more oxidation resistant and has a greater EMF stability than existing type K negative thermoelements.
Inventors
- 👤 C Starr
- 👤 T Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:39
CPC Classifications
H; H10; H10N; H10N10/00; H10N10/80; H10N10/85; H10N10/851; H10N10/8556
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
24 words
A thermocouple according to claim 1 wherein in said negative thermoelement alloy said silicon is from about 3.75 to about 4.25 percent by weight.
Claim 2
Dependent Claim
24 words
A thermocouple according to claim 1 wherein in said negative thermoelement alloy said magnesium is from about 0.10 to about 0.20 percent by weight.
Claim 3
Dependent Claim
24 words
A thermocouple according to claim 2 wherein in said negative thermoelement alloy said magnesium is from about 0.10 to about 0.20 percent by weight.
Claim 4
Dependent Claim
29 words
A thermocouple according to claim 4 wherein in said negative thermoelement alloy said silicon is about 4 percent by weight and said magnesium is about 0.15 percent by weight.
References Cited (Backward Citations)
US1076438A
Cited
US2224573A
Cited
US2859264A
Cited
US2990440A
Cited
US3411956A
Cited
SU172087A1
Cited
US3673003A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |