US2444172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ophthalmoscope with light deviating means
Assignee: Individual
•
Filing: 1945-10-29
•
Granted: 1948-06-29
•
Expires: 1965-10-29
Abstract
No abstract record available.
Inventors
- 👤 Arnold L Silverstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:33
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/10; A61B3/12; A61B3/1208
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US738887A
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US989244A
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US987951A
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GB191120389A
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US1529225A
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US1611167A
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US1680534A
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US1579990A
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US1570623A
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US1738986A
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US2229410A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-29 | 1951-12-29 | 1952-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-29 | 1955-12-29 | 1956-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-29 | 1959-12-29 | 1960-06-29 | $7700.00 | Window Closed / Lapsed |