US2798942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Illuminating fixture with changeable screen
Assignee: Individual
•
Filing: 1954-01-27
•
Granted: 1957-07-09
•
Expires: 1974-01-27
Abstract
No abstract record available.
Inventors
- 👤 David H Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:16
CPC Classifications
F; F21; F21V; F21V17/00; F21V17/10; F21V17/16; F21V17/164; F21V3/00; F21V3/04; F21V9/00; F21V9/08; F21V9/40
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) | 1960-07-08 | 1961-01-07 | 1961-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-07-08 | 1965-01-07 | 1965-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-07-08 | 1969-01-07 | 1969-07-09 | $7700.00 | Window Closed / Lapsed |