US2437704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the melt extrusion of artificial materials
Assignee: Celanese Corp
•
Filing: 1944-12-06
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Granted: 1948-03-16
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Expires: 1964-12-06
Abstract
No abstract record available.
Inventors
- 👤 Monerieff Robert Wighton
- 👤 Pool William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:53
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/04; D01D1/06; D01D1/09; Y; Y10; Y10T; Y10T137/00; Y10T137/7287
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2177658A
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US2207426A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-16 | 1951-09-15 | 1952-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-16 | 1955-09-15 | 1956-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-16 | 1959-09-15 | 1960-03-16 | $7700.00 | Window Closed / Lapsed |