Patent US2645813A successfully refreshed from Google Patents.
US2645813A
Expired / Lapsed
US
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Process and apparatus for continuous milling of plastic material
Assignee: Union Carbide Corp
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Filing: 1950-06-29
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Granted: 1953-07-21
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Expires: 1970-06-29
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Swallow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:38
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/30; B29B7/34; B29B7/52; B29B7/523; B29B7/526
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1980589A
Cited
US2261257A
Cited
US2264237A
Cited
US2319040A
Cited
US2434707A
Cited
US2519014A
Cited
US2519834A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-07-20 | 1957-01-19 | 1957-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-20 | 1961-01-19 | 1961-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-20 | 1965-01-19 | 1965-07-21 | $7700.00 | Window Closed / Lapsed |