Patent US2289524A successfully refreshed from Google Patents.
US2289524A
Expired / Lapsed
US
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Mold for shaping sheets of plastic material
Assignee: Univis Lens Co
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Filing: 1941-02-24
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Granted: 1942-07-14
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Expires: 1961-02-24
Abstract
No abstract record available.
Inventors
- 👤 Charles V Smith
- 👤 Frank P Willams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:55
CPC Classifications
B; B29; B29D; B29D11/00; B29D11/00009; B29C; B29C33/00; B29C33/30; B29C33/303; B29C51/00; B29C51/08; B29C51/082; B30; B30B; B30B15/00; B30B15/06; B29C43/00; Y; Y10; Y10S; Y10S264/00; Y10S264/65; Y10S425/00; Y10S425/808
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) | 1945-07-13 | 1946-01-12 | 1946-07-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-07-13 | 1950-01-12 | 1950-07-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-07-13 | 1954-01-12 | 1954-07-14 | $7700.00 | Window Closed / Lapsed |