US2574186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for viewing stereoscopic pictures
Assignee: American Optical Corp
•
Filing: 1946-03-04
•
Granted: 1951-11-06
•
Expires: 1966-03-04
Abstract
No abstract record available.
Inventors
- 👤 Mahler Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:15
CPC Classifications
G; G02; G02B; G02B30/00; G02B30/20; G02B30/22; G02B30/25
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1503766A
Cited
US1931228A
Cited
US2240703A
Cited
US2203687A
Cited
US2165974A
Cited
US2255631A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-11-05 | 1955-05-07 | 1955-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-11-05 | 1959-05-07 | 1959-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-11-05 | 1963-05-07 | 1963-11-06 | $7700.00 | Window Closed / Lapsed |