US3210751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for producing a current pulse upon a break in a series circuit
Assignee: Tamura Electric Works Ltd
•
Filing: 1961-02-06
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Granted: 1965-10-05
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Expires: 1981-02-06
Abstract
No abstract record available.
Inventors
- 👤 Shiraishi Kagemasa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:19
CPC Classifications
G; G08; G08B; G08B21/00; G08B21/18; G08B21/185
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2622213A
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US2848658A
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US2828450A
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FR1155336A
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US2945133A
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US2982868A
Cited
US3014207A
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US3061671A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |