Patent US2317447A successfully refreshed from Google Patents.
US2317447A
Expired / Lapsed
US
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Calender and process for making plastic sheets
Assignee: Carbide and Carbon Chemicals Corp
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Filing: 1940-07-18
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Granted: 1943-04-27
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Expires: 1960-07-18
Abstract
No abstract record available.
Inventors
- 👤 Domizi Dario
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:10
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/22; B29C43/24
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) | 1946-04-26 | 1946-10-26 | 1947-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-04-26 | 1950-10-26 | 1951-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-04-26 | 1954-10-26 | 1955-04-27 | $7700.00 | Window Closed / Lapsed |