Patent US4123295A successfully refreshed from Google Patents.
Patent US2543304A successfully refreshed from Google Patents.
US2543304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for maintaining aspect ratio constant
Assignee: Avco Manufacturing Corp
•
Filing: 1949-12-08
•
Granted: 1951-02-27
•
Expires: 1969-12-08
Abstract
No abstract record available.
Inventors
- 👤 Hans G Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:48
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/22; H04N3/223; H03; H03K; H03K3/00; H03K3/02; H03K3/04; H03K3/16; H04N3/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2440787A
Cited
US2451641A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |