US3530455A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door chime alarm system
Assignee: AV ELECTRONICS Corp A CORP OF
•
Filing: 1967-03-02
•
Granted: 1970-09-22
•
Expires: 1987-03-02
Abstract
No abstract record available.
Inventors
- 👤 Erhard O Ressler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:10
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/02; G08B13/08; G08B19/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2911637A
Cited
US2917731A
Cited
US3200258A
Cited
US3162772A
Cited
US3221317A
Cited
US3226705A
Cited
US3284787A
Cited
US3286250A
Cited
US3309689A
Cited
US3404393A
Cited
US3422398A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-21 | 1974-03-23 | 1974-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-21 | 1978-03-23 | 1978-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-21 | 1982-03-23 | 1982-09-22 | $7700.00 | Window Closed / Lapsed |