US2675417A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyroelectric device
Assignee: Erie Resistor Corp
•
Filing: 1952-08-14
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Granted: 1954-04-13
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Expires: 1972-08-14
Abstract
No abstract record available.
Inventors
- 👤 Jerome D Heibel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:00
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US241859A
Cited
US289631A
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US824684A
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US903116A
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US1234515A
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US1286429A
Cited
US2415005A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |