Patent US4543571A successfully refreshed from Google Patents.
Patent US1483489A successfully refreshed from Google Patents.
US1483489A
Expired / Lapsed
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Signaling system for warships
Assignee: Sperry Gyroscope Co Ltd
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Filing: 1918-05-20
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Granted: 1924-02-12
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Expires: 1938-05-20
Abstract
No abstract record available.
Inventors
- 👤 Elmer A Sperry
- 👤 Meitner Elemer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:11
CPC Classifications
F; F41; F41G; F41G3/00; F41G3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1927-02-11 | 1927-08-13 | 1928-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1931-02-11 | 1931-08-13 | 1932-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1935-02-11 | 1935-08-13 | 1936-02-12 | $7700.00 | Window Closed / Lapsed |