Patent US2509211A successfully refreshed from Google Patents.
US2509211A
Expired / Lapsed
US
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Apparatus for blocking lenses
Assignee: Individual
•
Filing: 1947-06-27
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Granted: 1950-05-30
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Expires: 1967-06-27
Abstract
No abstract record available.
Inventors
- 👤 George A Clement
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:41
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/005
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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FR460049A
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US1284283A
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US1436626A
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US1332778A
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US1456673A
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US1438100A
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DE401399C
Cited
US1588435A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-29 | 1953-11-28 | 1954-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-29 | 1957-11-28 | 1958-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-29 | 1961-11-28 | 1962-05-30 | $7700.00 | Window Closed / Lapsed |