Patent US2144257A successfully refreshed from Google Patents.
US2144257A
Expired / Lapsed
US
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Stereoscopic range finder
Assignee: Bausch and Lomb Inc
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Filing: 1937-07-20
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Granted: 1939-01-17
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Expires: 1957-07-20
Abstract
No abstract record available.
Inventors
- 👤 Eppenstein Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:41
CPC Classifications
G; G01; G01C; G01C3/00; G01C3/10; G01C3/14; G01C3/16
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1942-01-16 | 1942-07-18 | 1943-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-01-16 | 1946-07-18 | 1947-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-01-16 | 1950-07-18 | 1951-01-17 | $7700.00 | Window Closed / Lapsed |