US2933015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foldable stereoscope device for viewing transparencies and prints
Assignee: Individual
•
Filing: 1958-05-06
•
Granted: 1960-04-19
•
Expires: 1978-05-06
Abstract
No abstract record available.
Inventors
- 👤 Somach Norman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 10:44
CPC Classifications
G; G02; G02B; G02B30/00; G02B30/20; G02B30/34; G02B30/37
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2190646A
Cited
US2674920A
Cited
US2768554A
Cited
US2724991A
Cited
US2789460A
Cited
US2794367A
Cited
US2872844A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-04-19 | 1963-10-19 | 1964-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-04-19 | 1967-10-19 | 1968-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-04-19 | 1971-10-19 | 1972-04-19 | $7700.00 | Window Closed / Lapsed |