US3451739A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable friction slip drive for microscopes
Assignee: Swift Instruments Inc
•
Filing: 1966-10-25
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Granted: 1969-06-24
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Expires: 1986-10-25
Abstract
No abstract record available.
Inventors
- 👤 Robert C Fitzgibbons
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:19
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/24; G02B21/241
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1968094A
Cited
GB409245A
Cited
US2251739A
Cited
US2560169A
Cited
US2820396A
Cited
US3260157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |