US2094477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for amplifying and/or frequency transformation of electrical oscillations
Assignee: Koninklijke Philips NV
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Filing: 1935-09-04
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Granted: 1937-09-28
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Expires: 1955-09-04
Abstract
No abstract record available.
Inventors
- 👤 Tellegen Bernardus Do Hubertus
- 👤 Vries Gerrit De
- 👤 Bakker Cornelis Jan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:55
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/54; H01; H01J; H01J25/00; H01J25/68
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1940-09-27 | 1941-03-29 | 1941-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1944-09-27 | 1945-03-29 | 1945-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1948-09-27 | 1949-03-29 | 1949-09-28 | $7700.00 | Window Closed / Lapsed |