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US2791802A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extruder
Assignee: Celanese Corp
•
Filing: 1953-03-04
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Granted: 1957-05-14
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Expires: 1973-03-04
Abstract
No abstract record available.
Inventors
- 👤 Weber Harold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:54
CPC Classifications
D; D01; D01D; D01D1/00; D01D1/06; B; B29; B29C; B29C48/00; B29C48/03; B29C48/05; B29C48/25; B29C48/285; B29C48/288; B29C48/2886; B29C48/29; B29C48/36; B29C48/395; D01D1/04; B29K; B29K2105/00; B29K2105/06; B29K2105/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1156096A
Cited
FR809469A
Cited
US2336159A
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US2303340A
Cited
US2370469A
Cited
US2471813A
Cited
US2615199A
Cited
US2707306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-13 | 1960-11-12 | 1961-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-13 | 1964-11-12 | 1965-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-13 | 1968-11-12 | 1969-05-14 | $7700.00 | Window Closed / Lapsed |