US2843765A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit element having a negative resistance
Assignee: International Standard Electric Corp
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Filing: 1953-03-09
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Granted: 1958-07-15
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Expires: 1973-03-09
Abstract
No abstract record available.
Inventors
- 👤 Aigrain Pierre Roger Raoul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:52
CPC Classifications
H; H03; H03G; H03G11/00; H03G11/02; H01; H01C; H01C7/00; H01C7/10; H03B; H03B7/00; H03B7/02; H03B7/06; H03B9/00; H03B9/01; H03B9/02; H03F; H03F3/00; H03F3/04; H03F3/10; H03K; H03K3/00; H03K3/02; H03K3/313; H03K3/45; H03K3/47; H10; H10D; H10D99/00; A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61F13/537; A61F13/539; A61F2013/53445; A61F2013/53765; A61F2013/53782; A61F2013/5395
Claims Analysis
Total Claims: 0
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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) | 1961-07-14 | 1962-01-13 | 1962-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-14 | 1966-01-13 | 1966-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-14 | 1970-01-13 | 1970-07-15 | $7700.00 | Window Closed / Lapsed |