US3450458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Field specimen microscope
Assignee: Individual
•
Filing: 1966-05-27
•
Granted: 1969-06-17
•
Expires: 1986-05-27
Abstract
No abstract record available.
Inventors
- 👤 Stanley G Potrzuski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:33
CPC Classifications
G; G02; G02B; G02B21/00; G02B21/0004; G02B21/0008
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US737844A
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US971798A
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US1002910A
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US2486026A
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US2552940A
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US3088367A
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US3112570A
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US3171883A
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US3121961A
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US3328502A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-16 | 1972-12-16 | 1973-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-16 | 1976-12-16 | 1977-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-16 | 1980-12-16 | 1981-06-17 | $7700.00 | Window Closed / Lapsed |