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Patent US2990440A successfully refreshed from Google Patents.
US2990440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermocouple
Assignee: Evonik Operations GmbH
•
Filing: 1959-05-12
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Granted: 1961-06-27
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Expires: 1979-05-12
Abstract
No abstract record available.
Inventors
- 👤 Obrowski Walter
- 👤 Seelen Carola Von
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:24
CPC Classifications
H; H10; H10N; H10N10/00; H10N10/80; H10N10/85; H10N10/851; H10N10/854
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
6 words
A THERMOCOUPLE COMPRISING AN ELECTROPOSITIVE EL
References Cited (Backward Citations)
GB773919A
Cited
US2859264A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |