US2522760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slide carrier for supporting lantern slides of varying thicknesses
Assignee: American Optical Corp
•
Filing: 1947-05-09
•
Granted: 1950-09-19
•
Expires: 1967-05-09
Abstract
No abstract record available.
Inventors
- 👤 David D Lowber
- 👤 Albin A Gradisar
- 👤 David I Critoph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:57
CPC Classifications
G; G03; G03B; G03B23/00; G03B23/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2335226A
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US1035872A
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US945619A
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US1012945A
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FR435599A
Cited
US1108256A
Cited
US2147260A
Cited
GB485498A
Cited
CH215992A
Cited
US2298413A
Cited
US2298369A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-09-18 | 1954-03-20 | 1954-09-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-09-18 | 1958-03-20 | 1958-09-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-09-18 | 1962-03-20 | 1962-09-19 | $7700.00 | Window Closed / Lapsed |