US2664885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereoscopic device
Assignee: Individual
•
Filing: 1951-11-26
•
Granted: 1954-01-05
•
Expires: 1971-11-26
Abstract
No abstract record available.
Inventors
- 👤 Gurney L Mandaville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:35
CPC Classifications
A; A61; A61H; A61H5/00; G; G02; G02B; G02B30/00; G02B30/20; G02B30/34; G02B30/36
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US739587A
Cited
US1423091A
Cited
US1680534A
Cited
US1649646A
Cited
US1804690A
Cited
US2186418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |