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US3492585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Battery-operated audio system having means for providing reduced battery current drain
Assignee: Heath Co
•
Filing: 1966-11-16
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Granted: 1970-01-27
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Expires: 1986-11-16
Abstract
No abstract record available.
Inventors
- 👤 Ralph Joseph Ludlam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:22
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/02; H03F1/0205; H03F1/0211; H03F1/0244; H04; H04W; H04W52/00; H04W52/02; H04W52/0209; H04W52/0261; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2218094A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |