US2424575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light shutter and dimmer
Assignee: VINCENT A MARCO
•
Filing: 1944-06-07
•
Granted: 1947-07-29
•
Expires: 1964-06-07
Abstract
No abstract record available.
Inventors
- 👤 Fred J Aves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:14
CPC Classifications
F; F21; F21S; F21S8/00; F21W; F21W2111/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191225028A
Cited
US1263234A
Cited
US2192345A
Cited
US2324384A
Cited
US2337746A
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US2361765A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-28 | 1951-01-27 | 1951-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-28 | 1955-01-27 | 1955-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-28 | 1959-01-27 | 1959-07-29 | $7700.00 | Window Closed / Lapsed |