US2553622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal and searchlight shutter
Assignee: Individual
•
Filing: 1947-08-21
•
Granted: 1951-05-22
•
Expires: 1967-08-21
Abstract
No abstract record available.
Inventors
- 👤 Otto J Zander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:37
CPC Classifications
F; F21; F21V; F21V11/00; F21V11/08; F21S; F21S45/00; F21S45/10; F21V11/10; F21W; F21W2107/00; F21W2107/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB189823399A
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US2015491A
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DE605721C
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US2168893A
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US2356178A
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US2336119A
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US2439330A
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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) | 1954-05-21 | 1954-11-20 | 1955-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-21 | 1958-11-20 | 1959-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-21 | 1962-11-20 | 1963-05-22 | $7700.00 | Window Closed / Lapsed |