Patent US2820839A successfully refreshed from Google Patents.
US2820839A
Expired / Lapsed
US
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Thermocouple
Assignee: Motors Liquidation Co
•
Filing: 1953-07-23
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Granted: 1958-01-21
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Expires: 1973-07-23
Abstract
No abstract record available.
Inventors
- 👤 Edwin C Schunke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:11
CPC Classifications
G; G01; G01K; G01K13/00; G01K13/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1526641A
Cited
GB461370A
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US2246563A
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US2314877A
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US2410218A
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US2652723A
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US2496806A
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US2496835A
Cited
US2485468A
Cited
US2653983A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |