US3486578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electro-mechanical reproduction of sound
Assignee: Individual
•
Filing: 1967-12-21
•
Granted: 1969-12-30
•
Expires: 1987-12-21
Abstract
No abstract record available.
Inventors
- 👤 Lawrence Albarino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:30
CPC Classifications
H; H04; H04R; H04R1/00; H04R1/20; H04R1/22; H04R1/28; H04R1/2807; H04R1/2838; H04R1/2842
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2900040A
Cited
US3090461A
Cited
US3101810A
Cited
US3170538A
Cited
US3329235A
Cited
US3268030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |