US3437928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-contained test probe with indicator lamp responsive to continuous or pulsed voltages
Assignee: AT&T Inc
•
Filing: 1964-12-21
•
Granted: 1969-04-08
•
Expires: 1984-12-21
Abstract
No abstract record available.
Inventors
- 👤 William E Baker
- 👤 Daniel M Foltz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:23
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/145; G01R19/155
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2474073A
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US2808559A
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US2942189A
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US3020418A
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US2963692A
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US3168728A
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US3136920A
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US3090039A
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US3201773A
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US3175165A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |