US2543561A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for displaying a projected image of a drawing
Assignee: Individual
•
Filing: 1949-01-27
•
Granted: 1951-02-27
•
Expires: 1969-01-27
Abstract
No abstract record available.
Inventors
- 👤 Tracy Madison Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:31
CPC Classifications
G; G03; G03B; G03B21/00; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49764; Y10T29/49769
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2464794A
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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) | 1954-02-26 | 1954-08-28 | 1955-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-02-26 | 1958-08-28 | 1959-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-02-26 | 1962-08-28 | 1963-02-27 | $7700.00 | Window Closed / Lapsed |