Patent US1888410A successfully refreshed from Google Patents.
US2515862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical device
Assignee: Individual
•
Filing: 1947-10-25
•
Granted: 1950-07-18
•
Expires: 1967-10-25
Abstract
No abstract record available.
Inventors
- 👤 James L Carlton
- 👤 Menin Bruno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:49
CPC Classifications
G; G02; G02B; G02B1/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR396040A
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GB209041A
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US1789112A
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US1783998A
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US1873302A
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US2076103A
Cited
US2030795A
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US2080463A
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US2492926A
Cited
US2259884A
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US2389645A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-07-17 | 1954-01-16 | 1954-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-17 | 1958-01-16 | 1958-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-17 | 1962-01-16 | 1962-07-18 | $7700.00 | Window Closed / Lapsed |