Patent US2907246A successfully refreshed from Google Patents.
US2907246A
Expired / Lapsed
US
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Vertical leveling mirror
Assignee: Farrand Optical Co Inc
•
Filing: 1955-10-27
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Granted: 1959-10-06
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Expires: 1975-10-27
Abstract
No abstract record available.
Inventors
- 👤 Clair L Farrand
- 👤 Harold J Hasbrouck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:30
CPC Classifications
G; G01; G01C; G01C5/00; G01C5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1085612A
Cited
GB137176A
Cited
US1689624A
Cited
US2346483A
Cited
US2429420A
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US2407416A
Cited
US2679181A
Cited
US2779231A
Cited
US2741940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |