Patent US2584697A successfully refreshed from Google Patents.
US2584697A
Expired / Lapsed
US
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Light projection apparatus
Assignee: Individual
•
Filing: 1950-08-19
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Granted: 1952-02-05
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Expires: 1970-08-19
Abstract
No abstract record available.
Inventors
- 👤 Roland E Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:50
CPC Classifications
F; F21; F21S; F21S41/00; F21S41/30; F21S41/32; F21S41/33; F21S41/338; F21S41/10; F21S41/14; F21S41/17; F21S41/173
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) | 1955-02-04 | 1955-08-06 | 1956-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-04 | 1959-08-06 | 1960-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-04 | 1963-08-06 | 1964-02-05 | $7700.00 | Window Closed / Lapsed |