US2604005A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection light source and light beam modifier combination
Assignee: Individual
•
Filing: 1949-01-21
•
Granted: 1952-07-22
•
Expires: 1969-01-21
Abstract
No abstract record available.
Inventors
- 👤 Charles A Hahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:19
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/14; G03B21/20; G03B21/2006; G03B21/2026; G03B21/208
Claims Analysis
Total Claims: 0
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US2240402A
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US2457042A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-22 | 1956-01-21 | 1956-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-22 | 1960-01-21 | 1960-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-22 | 1964-01-21 | 1964-07-22 | $7700.00 | Window Closed / Lapsed |