US2530531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereoscopic picture viewer
Assignee: Individual
•
Filing: 1946-03-13
•
Granted: 1950-11-21
•
Expires: 1966-03-13
Abstract
No abstract record available.
Inventors
- 👤 Clarence S Mcclellan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:12
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/08; G03B23/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1313241A
Cited
US778998A
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US874940A
Cited
US1519808A
Cited
US1544364A
Cited
US2006297A
Cited
US2318874A
Cited
US2299973A
Cited
US2364793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |