Patent US2443826A successfully refreshed from Google Patents.
US2443826A
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Apparatus for the manufacture of lenses
Assignee: Combined Optical Industries Ltd
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Filing: 1945-08-27
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Granted: 1948-06-22
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Expires: 1965-08-27
Abstract
No abstract record available.
Inventors
- 👤 Johnson John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:56
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/46; B29C45/56; B29C45/40; B29C45/4005; B29C45/561; B29D; B29D11/00; B29D11/00009; B29C2045/563; B29C2045/5635; B29C2045/5645; B29L; B29L2011/00; B29L2011/0016; Y; Y10; Y10S; Y10S425/00; Y10S425/004; Y10S425/808
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US162223A
Cited
US1673054A
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US1697741A
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US1925496A
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GB357992A
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GB388662A
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US2333131A
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US2298429A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-22 | 1951-12-22 | 1952-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-22 | 1955-12-22 | 1956-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-22 | 1959-12-22 | 1960-06-22 | $7700.00 | Window Closed / Lapsed |