US2429692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making ophthalmic lenses
Assignee: American Optical Corp
•
Filing: 1943-09-22
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Granted: 1947-10-28
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Expires: 1963-09-22
Abstract
No abstract record available.
Inventors
- 👤 William J Joyce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:59
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; B29D11/00471; B29C; B29C53/00; B29C53/02; B29C53/04; B29C53/046; C; C03; C03B; C03B23/00; C03B23/02; C03B23/023; C03B23/0235; B29L; B29L2011/00; B29L2011/0016; B29L2011/0041; B29L2031/00; B29L2031/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US669119A
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US993555A
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US1998897A
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US2094511A
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US2218654A
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US2167539A
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US2407806A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-27 | 1951-04-28 | 1951-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-27 | 1955-04-28 | 1955-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-27 | 1959-04-28 | 1959-10-28 | $7700.00 | Window Closed / Lapsed |