Patent US2720604A successfully refreshed from Google Patents.
US2720604A
Expired / Lapsed
US
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Low-temperature compensating alloy for magnetic instruments
Assignee: Motors Liquidation Co
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Filing: 1951-12-28
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Granted: 1955-10-11
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Expires: 1971-12-28
Abstract
No abstract record available.
Inventors
- 👤 Ralph H Mitchel
- 👤 Raymond E Schwyn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:26
CPC Classifications
G; G01; G01R; G01R11/00; G01R11/02; G01R11/17; G01R11/18; G01R11/185; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/49; G01P3/495; G01P3/4956
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
26 words
A TEMPERATURE-RESPONSIVE COMPENSATOR FOR MAGNETIC MEASURING INSTRUMENTS FORMED FROM AN ALLOY CONTAINING 2.2% TO 4% SILICON, 29% TO 32% NICKEL, AND THE BALANCE SUBSTANTIALLY ALL IRON.
Claim 2
Dependent Claim
26 words
A TEMPERATURE-RESPONSIVE COMPENSATOR FOR MAGNETIC MEASURING INSTRUMENTS FORMED FROM AN ALLOY CONTAINING 2.2% TO 4% SILICON, 29% TO 32% NICKEL, AND THE BALANCE SUBSTANTIALLY ALL IRON.
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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) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |