Patent US3834815A successfully refreshed from Google Patents.
Patent US2631199A successfully refreshed from Google Patents.
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 20:21
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/34; H03F3/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2070071A
Cited
US2240635A
Cited
US2208254A
Cited
US2310342A
Cited
US2329073A
Cited
GB584191A
Cited
US2432142A
Cited
US2462849A
Cited
US2471449A
Cited
US2562006A
Cited
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 |