Patent US2968548A successfully refreshed from Google Patents.
US2968548A
Expired / Lapsed
US
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Temperature compensating iron-nickelcopper alloys
Assignee: Huntington Alloys Corp
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Filing: 1958-12-15
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Granted: 1961-01-17
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Expires: 1978-12-15
Abstract
No abstract record available.
Inventors
- 👤 Clark Charles Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:16
CPC Classifications
G; G01; G01R; G01R11/00; G01R11/02; G01R11/17; G01R11/18; G01R11/185
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
59 words
A TEMPERATURE RESPONSIVE COMPENSATOR ELEMENT FOR USE IN MAGNETIC INDICATING INSTRUCMENTS SUBJECTS IN SERVICE TO CHANGES IN TEMPERATURE OVER A RELATIVELY WIDE RANGE OF TEMPERATURES, SAID ELEMENT BEING FORMED OF A TEMPERATURE COMPENSATING ALLOY CONTAINING 23% TO 28% NICKEL, NOT MORE THAN 0.03% CARBON, NOT MORE THAN 0.03% SILICON, FORM 6% TO 11% COPPER, AND THE BALANCE ESSENTIALLY IRON.
Claim 2
Dependent Claim
59 words
A TEMPERATURE RESPONSIVE COMPENSATOR ELEMENT FOR USE IN MAGNETIC INDICATING INSTRUCMENTS SUBJECTS IN SERVICE TO CHANGES IN TEMPERATURE OVER A RELATIVELY WIDE RANGE OF TEMPERATURES, SAID ELEMENT BEING FORMED OF A TEMPERATURE COMPENSATING ALLOY CONTAINING 23% TO 28% NICKEL, NOT MORE THAN 0.03% CARBON, NOT MORE THAN 0.03% SILICON, FORM 6% TO 11% COPPER, AND THE BALANCE ESSENTIALLY IRON.
Claim 3
Independent Claim
92 words
A METHOD FOR PRODUCING A MAGNETIC IRON-NICKELCOPPER TEMPERATURE COMPENSATION ALLOY HAVING A SPECIFIED AND PRE-REQUIRED CURIE TEMPERATURE WHICH COMPRISES THE STEPS OF ESTABLISHING A REFERENCE ALLOY COMPOSITION SUBSTANTIALLY FREE OF CARBON AND SILICON AND CONTAINING 23% TO 28% NICKEL, UP TO 11% COPPER, AND THE BALANCE ESSENTIALLY IRON BY THE SAME METHOD AND WITH THE SAME RAW MATERIALS AS TO BE EMPLOYED IN PREPARING THE TEMPERATURE COMPENSATION ALLOY, THE AMOUNTS OF NICKEL AND COPPER IN SAID REFERENCE ALLOY COMPOSITION BEING WITHIN THEIR RESPECTIVE RANGES SUCH THAT RELATIONSHIP EXPRESSED BY THE FOLLOWING EQUATION:
Claim 4
Independent Claim
92 words
A METHOD FOR PRODUCING A MAGNETIC IRON-NICKELCOPPER TEMPERATURE COMPENSATION ALLOY HAVING A SPECIFIED AND PRE-REQUIRED CURIE TEMPERATURE WHICH COMPRISES THE STEPS OF ESTABLISHING A REFERENCE ALLOY COMPOSITION SUBSTANTIALLY FREE OF CARBON AND SILICON AND CONTAINING 23% TO 28% NICKEL, UP TO 11% COPPER, AND THE BALANCE ESSENTIALLY IRON BY THE SAME METHOD AND WITH THE SAME RAW MATERIALS AS TO BE EMPLOYED IN PREPARING THE TEMPERATURE COMPENSATION ALLOY, THE AMOUNTS OF NICKEL AND COPPER IN SAID REFERENCE ALLOY COMPOSITION BEING WITHIN THEIR RESPECTIVE RANGES SUCH THAT RELATIONSHIP EXPRESSED BY THE FOLLOWING EQUATION:
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) | 1964-01-17 | 1964-07-18 | 1965-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-01-17 | 1968-07-18 | 1969-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-01-17 | 1972-07-18 | 1973-01-17 | $7700.00 | Window Closed / Lapsed |