Patent US2443390A successfully refreshed from Google Patents.
US2443390A
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US
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Method of making optical lenses
Assignee: Individual
•
Filing: 1940-07-23
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Granted: 1948-06-15
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Expires: 1960-07-23
Abstract
No abstract record available.
Inventors
- 👤 Kingston Arthur William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:03
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; B29C; B29C43/00; Y; Y10; Y10S; Y10S359/00; Y10S359/90; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1534671A
Cited
GB371451A
Cited
US1972166A
Cited
US2022639A
Cited
US2067580A
Cited
US2314838A
Cited
US2166215A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-15 | 1951-12-15 | 1952-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-15 | 1955-12-15 | 1956-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-15 | 1959-12-15 | 1960-06-15 | $7700.00 | Window Closed / Lapsed |