US2631199A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct current balance adjustment
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1950-09-23
•
Granted: 1953-03-10
•
Expires: 1970-09-23
Abstract
No abstract record available.
Inventors
- 👤 Maron Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:48
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/34; H03F3/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2240635A
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US2208254A
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US2310342A
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US2329073A
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GB584191A
Cited
US2432142A
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US2462849A
Cited
US2471449A
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US2562006A
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US2529459A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-09 | 1956-09-08 | 1957-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-09 | 1960-09-08 | 1961-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-09 | 1964-09-08 | 1965-03-10 | $7700.00 | Window Closed / Lapsed |