US1913519A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light projector
Assignee: Individual
•
Filing: 1933-01-25
•
Granted: 1933-06-13
•
Expires: 1953-01-25
Abstract
No abstract record available.
Inventors
- 👤 Harold E Smith
- 👤 Harry E Buffington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:54
CPC Classifications
F; F21; F21S; F21S41/00; F21S41/40; F21S41/43; F21S41/30; F21S41/32; F21S41/321; F21S41/323; F21S41/33; F21S41/338; F21S41/36; F21S41/365
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) | 1936-06-12 | 1936-12-12 | 1937-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-06-12 | 1940-12-12 | 1941-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-06-12 | 1944-12-12 | 1945-06-13 | $7700.00 | Window Closed / Lapsed |