Patent US3506883A successfully refreshed from Google Patents.
US3506883A
Expired / Lapsed
US
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Electrical locking device
Assignee: HEIWA DENKI KK
•
Filing: 1966-12-19
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Granted: 1970-04-14
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Expires: 1986-12-19
Abstract
No abstract record available.
Inventors
- 👤 Kazuo Sugiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:00
CPC Classifications
E; E05; E05B; E05B47/00; E05B47/06; E05B47/0607; E05B47/0001; E05B47/0002; E05B15/00; E05B15/10; E05B15/101; E05B2047/0007; E05B47/0006; E05C; E05C3/00; E05C3/12; E05C3/16; E05C3/22; E05C3/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2170694A
Cited
US3200591A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-13 | 1973-10-13 | 1974-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-13 | 1977-10-13 | 1978-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-13 | 1981-10-13 | 1982-04-14 | $7700.00 | Window Closed / Lapsed |