US3235799A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electroluminescent frequency sensitive visual indicator
Assignee: Individual
•
Filing: 1954-12-27
•
Granted: 1966-02-15
•
Expires: 1974-12-27
Abstract
No abstract record available.
Inventors
- 👤 Hurvitz Hyman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:59
CPC Classifications
H; H05; H05B; H05B33/00; H05B33/12; H05B33/20; H05B33/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
30 words
IN COMBINATION, A LAYER OF PIEZO-ELECTRIC MATERIAL, A LAYER OF DIELECTRIC MATERIAL SECURED TO SAID LAYER OF PIEZOELECTRIC MATERIAL, AND A QUANTITY OF ELECTROLUMINESCENT MATERIAL DISPERSED THROUGH SAID DIELECTRIC MATERIAL.
References Cited (Backward Citations)
US1685810A
Cited
US1817030A
Cited
US1814399A
Cited
US1830532A
Cited
US2247051A
Cited
US2306555A
Cited
US2339198A
Cited
US2508098A
Cited
US2602836A
Cited
US2624857A
Cited
US2780731A
Cited
US2858363A
Cited
US2694785A
Cited
US2894145A
Cited
US2698915A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-02-14 | 1969-08-16 | 1970-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-14 | 1973-08-16 | 1974-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-14 | 1977-08-16 | 1978-02-15 | $7700.00 | Window Closed / Lapsed |