US2904758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for converting impedances
Assignee: US Philips Corp
•
Filing: 1956-10-08
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Granted: 1959-09-15
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Expires: 1976-10-08
Abstract
No abstract record available.
Inventors
- 👤 Miranda Heine Andries Rodri De
- 👤 Tulp Theodorus Joannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:48
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/16; H04B3/18; H03; H03H; H03H11/00; H03H11/02; H03H11/40
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB536583A
Cited
US2769908A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-14 | 1963-03-16 | 1963-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-14 | 1967-03-16 | 1967-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-14 | 1971-03-16 | 1971-09-15 | $7700.00 | Window Closed / Lapsed |