Patent US2469388A successfully refreshed from Google Patents.
US2469388A
Expired / Lapsed
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Multiple lens hand type ophthalmoscope
Assignee: American Cystoscope Makers Inc
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Filing: 1946-04-24
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Granted: 1949-05-10
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Expires: 1966-04-24
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Held
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:51
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)
DE132432C
Cited
US254139A
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US1507447A
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US1631329A
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US1889456A
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US1795691A
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GB331862A
Cited
US1893327A
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US2269962A
Cited
US2370514A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |