Patent US2520691A successfully refreshed from Google Patents.
US2520691A
Expired / Lapsed
US
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Ornamental bubbling light
Assignee: Individual
•
Filing: 1945-05-30
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Granted: 1950-08-29
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Expires: 1965-05-30
Abstract
No abstract record available.
Inventors
- 👤 Carl W Otis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:44
CPC Classifications
H; H01; H01K; H01K7/00; H01K7/06; F; F21; F21S; F21S10/00; F21S10/002; G; G09; G09F; G09F13/00; G09F13/24; Y; Y10; Y10S; Y10S362/00; Y10S362/806; Y10S362/81
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) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |