US3000002A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic alarm system
Assignee: VEB FUNKWERK KOPENICK
•
Filing: 1956-02-29
•
Granted: 1961-09-12
•
Expires: 1976-02-29
Abstract
No abstract record available.
Inventors
- 👤 Rehahn Jens Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:34
CPC Classifications
H; H04; H04L; H04L15/00; H04L15/04; H04L15/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2094733A
Cited
US2083849A
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US2116990A
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US2235804A
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US2564692A
Cited
US2552174A
Cited
US2568918A
Cited
US2761060A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-11 | 1965-03-13 | 1965-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-11 | 1969-03-13 | 1969-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-11 | 1973-03-13 | 1973-09-12 | $7700.00 | Window Closed / Lapsed |