Patent US2697431A successfully refreshed from Google Patents.
US2697431A
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Microscope for distinguishing between malignant and sound cellular tissue at difficultly accessible parts in deep cavities of the body
Assignee: C Reichert Optische Werke AG
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Filing: 1950-10-10
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Granted: 1954-12-21
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Expires: 1970-10-10
Abstract
No abstract record available.
Inventors
- 👤 Antoine Tassilo
- 👤 Grunberger Viktor
- 👤 Kodal Gustav
- 👤 Wasner Karl
- 👤 Kenzian Adolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:33
CPC Classifications
A; A61; A61B; A61B1/00; A61B1/303; A61B1/00142; G; G02; G02B; G02B21/00; G02B21/0004; G02B21/0012; A61B1/06; A61B1/0661; A61B1/0669
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1431902A
Cited
DE483158C
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US1735949A
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US2097762A
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US2059781A
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US2138665A
Cited
US2103230A
Cited
US2357378A
Cited
US2471879A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-20 | 1958-06-21 | 1958-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-20 | 1962-06-21 | 1962-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-20 | 1966-06-21 | 1966-12-21 | $7700.00 | Window Closed / Lapsed |