US2745138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the manufacture of plastic lenses from monomeric materials
Assignee: OPTICAL PLASTICS Corp
•
Filing: 1953-05-26
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Granted: 1956-05-15
•
Expires: 1973-05-26
Abstract
No abstract record available.
Inventors
- 👤 John O Beattie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:20
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; B29D11/00413; B29C; B29C33/00; B29C33/0022; B29C45/00; Y; Y10; Y10S; Y10S425/00; Y10S425/808
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US448133A
Cited
US1177177A
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US1755981A
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US2409958A
Cited
US2443826A
Cited
US2447689A
Cited
US2542386A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |