US2547348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corneal sighting gauge for trial frames
Assignee: Bausch and Lomb Inc
•
Filing: 1949-04-13
•
Granted: 1951-04-03
•
Expires: 1969-04-13
Abstract
No abstract record available.
Inventors
- 👤 Donald T Street
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:37
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/02; A61B3/028; A61B3/04; G; G02; G02C; G02C13/00; G02C13/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1481926A
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US1429854A
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US1710245A
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US2056469A
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US2068103A
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US2295791A
Cited
US2432676A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |