US2720045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transparency viewer combined ejector and light switch
Assignee: Individual
•
Filing: 1951-06-08
•
Granted: 1955-10-11
•
Expires: 1971-06-08
Abstract
No abstract record available.
Inventors
- 👤 Miller Gustave
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:43
CPC Classifications
G; G02; G02B; G02B27/00; G02B27/02; G02B27/022; G02B27/024; G02B27/025; Y; Y10; Y10S; Y10S40/00; Y10S40/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1989803A
Cited
US2394225A
Cited
CH62040A
Cited
US1712854A
Cited
US2495047A
Cited
US2543670A
Cited
US2520432A
Cited
US2666360A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-10 | 1959-04-11 | 1959-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-10 | 1963-04-11 | 1963-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-10 | 1967-04-11 | 1967-10-11 | $7700.00 | Window Closed / Lapsed |