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US2691100A
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Assignee: National Research Council Canada
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Filing: 1950-07-24
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Granted: 1954-10-05
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Expires: 1970-07-24
Abstract
No abstract record available.
Inventors
- 👤 Norman F Moody
- 👤 William D Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:25
CPC Classifications
H; H03; H03K; H03K23/00; H03K23/82; H03K21/00; H03K21/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2306386A
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US2416158A
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US2436963A
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US2503662A
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US2521788A
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US2516146A
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US2513442A
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US2563102A
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US2540442A
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US2563123A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-04 | 1958-04-05 | 1958-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-04 | 1962-04-05 | 1962-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-04 | 1966-04-05 | 1966-10-05 | $7700.00 | Window Closed / Lapsed |