US2757573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foldable viewer for stereoscopic pictures
Assignee: Individual
•
Filing: 1954-08-03
•
Granted: 1956-08-07
•
Expires: 1974-08-03
Abstract
No abstract record available.
Inventors
- 👤 Richard L Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:25
CPC Classifications
G; G02; G02B; G02B30/00; G02B30/20; G02B30/34; G02B30/37; Y; Y10; Y10S; Y10S229/00; Y10S229/921
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US712410A
Cited
US2131444A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-07 | 1960-02-06 | 1960-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-07 | 1964-02-06 | 1964-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-07 | 1968-02-06 | 1968-08-07 | $7700.00 | Window Closed / Lapsed |