Patent US2552409A successfully refreshed from Google Patents.
US2552409A
Expired / Lapsed
US
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Ophthalmic mounting
Assignee: MARINE OPTICAL Manufacturing CO
•
Filing: 1948-02-16
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Granted: 1951-05-08
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Expires: 1968-02-16
Abstract
No abstract record available.
Inventors
- 👤 Ditto Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:34
CPC Classifications
G; G02; G02C; G02C5/00; G02C5/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1708208A
Cited
GB518938A
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US2300834A
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US2355053A
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GB574558A
Cited
US2372059A
Cited
US2389742A
Cited
US2436606A
Cited
US2478334A
Cited
US2474119A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-07 | 1954-11-06 | 1955-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-07 | 1958-11-06 | 1959-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-07 | 1962-11-06 | 1963-05-08 | $7700.00 | Window Closed / Lapsed |