US3218636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piezoelectric signalling device
Assignee: Automatic Electric Laboratories Inc
•
Filing: 1962-10-15
•
Granted: 1965-11-16
•
Expires: 1982-10-15
Abstract
No abstract record available.
Inventors
- 👤 Joseph M Bernstein
- 👤 Naomi S Suloway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:04
CPC Classifications
G; G10; G10K; G10K1/00; G10K1/06; G10K1/062; H; H04; H04Q; H04Q5/00; H04Q5/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
41 words
A SIGNALLING DEVICE FOR OPERATION ON ALTERNATING CURRENT, SAID DEVICE COMPRISING: A BASE; GONG MEANS MOUNTED ON SAID BASE TO PRODUCE ACOUSTICAL ENERGY WHEN STRUCK; AND PIEZOELECTRIC MEANS MOUNTED ON SAID BASE IN CLOSE PROXIMITY TO SAID GONG MEANS, SAID PIEZOELECTRIC
References Cited (Backward Citations)
US3004177A
Cited
US2498990A
Cited
US2928069A
Cited
US2953779A
Cited
US3026377A
Cited
US2951910A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |