Patent US2435680A successfully refreshed from Google Patents.
US2435680A
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US
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Apparatus for electrically testing material
Assignee: Allen B du Mont Laboratories Inc
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Filing: 1944-02-26
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Granted: 1948-02-10
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Expires: 1964-02-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Thomas T Goldsmith
- 👤 Mann Estle Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:16
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/12; G01R33/123
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE349002C
Cited
FR682205A
Cited
US2010189A
Cited
GB406903A
Cited
US2217843A
Cited
US2177528A
Cited
US2214625A
Cited
US2280524A
Cited
US2380929A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-09 | 1951-08-11 | 1952-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-09 | 1955-08-11 | 1956-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-09 | 1959-08-11 | 1960-02-10 | $7700.00 | Window Closed / Lapsed |