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US2237744A
Expired / Lapsed
US
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Contact lens and method of making the same
Assignee: Individual
•
Filing: 1939-12-30
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Granted: 1941-04-08
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Expires: 1959-12-30
Abstract
No abstract record available.
Inventors
- 👤 John E Mullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:28
CPC Classifications
B; B24; B24B; B24B13/00; B24B13/04; B24B13/046; B29; B29D; B29D11/00; B29D11/00932; Y; Y10; Y10S; Y10S425/00; Y10S425/808; Y10T; Y10T82/00; Y10T82/10; Y10T82/14; Y10T82/148
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-04-07 | 1944-10-07 | 1945-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-04-07 | 1948-10-07 | 1949-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-04-07 | 1952-10-07 | 1953-04-08 | $7700.00 | Window Closed / Lapsed |