US3536836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Acoustically actuated switch
Assignee: Individual
•
Filing: 1968-10-25
•
Granted: 1970-10-27
•
Expires: 1988-10-25
Abstract
No abstract record available.
Inventors
- 👤 Erich A Pfeiffer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:24
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/78; E; E05; E05F; E05F15/00; E05F15/70; E05F15/77; H03K17/94
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3171085A
Cited
GB945192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-10-26 | 1974-04-27 | 1974-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-10-26 | 1978-04-27 | 1978-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-10-26 | 1982-04-27 | 1982-10-27 | $7700.00 | Window Closed / Lapsed |