US2705490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microscope for the examination of living tissues in body cavities
Assignee: Carl Zeiss AG
•
Filing: 1950-12-07
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Granted: 1955-04-05
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Expires: 1970-12-07
Abstract
No abstract record available.
Inventors
- 👤 Littmann Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:09
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/0004; G02B21/0012
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US532666A
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US1848788A
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US1864895A
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US828511A
Cited
US1143667A
Cited
US1459313A
Cited
US1873149A
Cited
US2195657A
Cited
DE709732C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-04-04 | 1958-10-04 | 1959-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-04-04 | 1962-10-04 | 1963-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-04-04 | 1966-10-04 | 1967-04-05 | $7700.00 | Window Closed / Lapsed |