US2519251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Johanson
Assignee: —
•
Filing: —
•
Granted: 1950-08-15
•
Expires: 1967-08-15
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:20
CPC Classifications
G; G03; G03B; G03B23/00; G03B21/00; G03B21/001; G03B15/00; G03B15/08; G03B21/14; G03B21/20; G03B21/2046; H; H04; H04N; H04N9/00; H04N9/12; H04N9/31; H04N9/3141; F; F21; F21W; F21W2131/00; F21W2131/40; F21W2131/406
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) | 1953-08-14 | 1954-02-13 | 1954-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-14 | 1958-02-13 | 1958-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-14 | 1962-02-13 | 1962-08-15 | $7700.00 | Window Closed / Lapsed |