Patent US2788470A successfully refreshed from Google Patents.
US2788470A
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US
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Variable composite electronic apparatus
Assignee: AUDIO PRODUCTS Corp
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Filing: 1953-08-17
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Granted: 1957-04-09
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Expires: 1973-08-17
Abstract
No abstract record available.
Inventors
- 👤 George J Giel
- 👤 Deryl K Kinsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:18
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |