Patent US2436615A successfully refreshed from Google Patents.
US2436615A
Expired / Lapsed
US
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Apparatus for detecting imperfections in insulating materials
Assignee: Individual
•
Filing: 1943-07-05
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Granted: 1948-02-24
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Expires: 1963-07-05
Abstract
No abstract record available.
Inventors
- 👤 Dick E Stearns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:15
CPC Classifications
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Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2157929A
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US1561483A
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US2087783A
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US2032904A
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US2258303A
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US2304513A
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US2265717A
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US2280119A
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US2306529A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-23 | 1951-08-25 | 1952-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-23 | 1955-08-25 | 1956-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-23 | 1959-08-25 | 1960-02-24 | $7700.00 | Window Closed / Lapsed |