US2458384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding of lenses or of dies therefor
Assignee: Combined Optical Industries Ltd
•
Filing: 1945-03-09
•
Granted: 1949-01-04
•
Expires: 1965-03-09
Abstract
No abstract record available.
Inventors
- 👤 Jeffree John Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:31
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/02; B24B13/026; B24B9/00; B24B9/02; B24B9/06; B24B9/08; B24B9/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US995393A
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US1383863A
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US1221280A
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US1343522A
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US1520703A
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US1639012A
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US1827748A
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FR755354A
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US2176154A
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US2352386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-01-04 | 1952-07-05 | 1953-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-01-04 | 1956-07-05 | 1957-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-01-04 | 1960-07-05 | 1961-01-04 | $7700.00 | Window Closed / Lapsed |