US2787704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant band-width input stage with high q antenna
Assignee: US Philips Corp
•
Filing: 1955-04-19
•
Granted: 1957-04-02
•
Expires: 1975-04-19
Abstract
No abstract record available.
Inventors
- 👤 Boelens Willem Wigger
- 👤 Tap Jan Willem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:13
CPC Classifications
H; H03; H03J; H03J3/00; H03J3/02; H03J3/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |