US2645972A
Expired / Lapsed
US
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Adjustment mechanism for microscopes
Assignee: American Optical Corp
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Filing: 1949-11-12
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Granted: 1953-07-21
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Expires: 1969-11-12
Abstract
No abstract record available.
Inventors
- 👤 Thomas G Aitcheson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:22
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/24; G02B21/241; G02B21/242; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576; Y10T74/18624; Y10T74/1864; Y10T74/18752; Y10T74/20; Y10T74/20207; Y10T74/20372; Y10T74/20384; Y10T74/2039
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |