Patent US3468328A successfully refreshed from Google Patents.
US3468328A
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US
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Distributed amplifier
Assignee: Bowles Engineering Corp
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Filing: 1965-10-15
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Granted: 1969-09-23
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Expires: 1985-10-15
Abstract
No abstract record available.
Inventors
- 👤 Eric E Metzger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:33
CPC Classifications
F; F15; F15C; F15C1/00; F15C1/08; F15C1/10; F15C1/12; Y; Y10; Y10T; Y10T137/00; Y10T137/206; Y10T137/212; Y10T137/2125; Y10T137/218; Y10T137/2191; Y10T137/2196
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1628723A
Cited
US3075548A
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US3229705A
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US3199781A
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US3250469A
Cited
US3338515A
Cited
US3339570A
Cited
US3276689A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-09-22 | 1973-03-24 | 1973-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-09-22 | 1977-03-24 | 1977-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-09-22 | 1981-03-24 | 1981-09-23 | $7700.00 | Window Closed / Lapsed |