US3513415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tuning fork filters having broadened band-pass
Assignee: Bulova Watch Co Inc
•
Filing: 1967-05-09
•
Granted: 1970-05-19
•
Expires: 1987-05-09
Abstract
No abstract record available.
Inventors
- 👤 Frank Dostal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:58
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/46; H03H9/48
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2469951A
Cited
US2522302A
Cited
US3354413A
Cited
US3350667A
Cited
US3361994A
Cited
US3303705A
Cited
US3344367A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-05-18 | 1973-11-17 | 1974-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-05-18 | 1977-11-17 | 1978-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-05-18 | 1981-11-17 | 1982-05-19 | $7700.00 | Window Closed / Lapsed |