US2935910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stereoscopic headband loupe
Assignee: Individual
•
Filing: 1955-05-12
•
Granted: 1960-05-10
•
Expires: 1975-05-12
Abstract
No abstract record available.
Inventors
- 👤 Arno G Schmidt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:24
CPC Classifications
G; G02; G02B; G02B25/00; G02B25/002; G02B25/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US749046A
Cited
US1905675A
Cited
US2024322A
Cited
US2270931A
Cited
US2425522A
Cited
GB595729A
Cited
US2659266A
Cited
US2625855A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-10 | 1963-11-09 | 1964-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-10 | 1967-11-09 | 1968-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-10 | 1971-11-09 | 1972-05-10 | $7700.00 | Window Closed / Lapsed |