US2544371A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microscope with frictional vernier drive
Assignee: Fed Manufacturing & Engineering Corp
•
Filing: 1947-12-12
•
Granted: 1951-03-06
•
Expires: 1967-12-12
Abstract
No abstract record available.
Inventors
- 👤 Weiser Sidney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:58
CPC Classifications
G; G02; G02B; G02B7/00; G02B7/02; G02B7/14; G02B21/00; G02B21/24; G02B21/241
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1889794A
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US1991845A
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US2017823A
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US1991846A
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US2101928A
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US2026724A
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US2101594A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-05 | 1954-09-04 | 1955-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-05 | 1958-09-04 | 1959-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-05 | 1962-09-04 | 1963-03-06 | $7700.00 | Window Closed / Lapsed |