Patent US2491507A successfully refreshed from Google Patents.
US2491507A
Expired / Lapsed
US
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Apparatus for making flat plastic articles
Assignee: Individual
•
Filing: 1946-03-11
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Granted: 1949-12-20
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Expires: 1966-03-11
Abstract
No abstract record available.
Inventors
- 👤 Lyon George Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:40
CPC Classifications
B; B29; B29C; B29C43/00; B29C43/22; B29L; B29L2007/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1327721A
Cited
US2197811A
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US1952556A
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US2075735A
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US2315477A
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US2407503A
Cited
US2319859A
Cited
US2340834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-19 | 1953-06-20 | 1953-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-19 | 1957-06-20 | 1957-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-19 | 1961-06-20 | 1961-12-20 | $7700.00 | Window Closed / Lapsed |