US3028508A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Saw tooth wave generators
Assignee: Marconis Wireless Telegraph Co Ltd
•
Filing: 1958-03-10
•
Granted: 1962-04-03
•
Expires: 1978-03-10
Abstract
No abstract record available.
Inventors
- 👤 Helsdon Peter Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:49
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/48; H03K4/60; H03K4/62; H03K4/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2633554A
Cited
US2571824A
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US2728857A
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US2760109A
Cited
US2712616A
Cited
US2903621A
Cited
US2896115A
Cited
US2907900A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-02 | 1965-10-02 | 1966-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-02 | 1969-10-02 | 1970-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-02 | 1973-10-02 | 1974-04-03 | $7700.00 | Window Closed / Lapsed |