Patent US3038133A successfully refreshed from Google Patents.
US3038133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-reciprocal electric coupling device
Assignee: US Philips Corp
•
Filing: 1957-10-15
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Granted: 1962-06-05
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Expires: 1977-10-15
Abstract
No abstract record available.
Inventors
- 👤 Vries Gerrit De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:14
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2561489A
Cited
GB674874A
Cited
US2589494A
Cited
GB716257A
Cited
US2798205A
Cited
US2834943A
Cited
US2755447A
Cited
US2757359A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-06-04 | 1965-12-04 | 1966-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-04 | 1969-12-04 | 1970-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-04 | 1973-12-04 | 1974-06-05 | $7700.00 | Window Closed / Lapsed |