Patent US2293174A successfully refreshed from Google Patents.
US2293174A
Expired / Lapsed
US
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Manufacture of artificial materials
Assignee: Celanese Corp
•
Filing: 1940-06-27
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Granted: 1942-08-18
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Expires: 1960-06-27
Abstract
No abstract record available.
Inventors
- 👤 Rooney James Henry
- 👤 Hawtin Philip Richard
- 👤 Chaplin Stephen Roy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:07
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/24; B29C41/32; B29C41/28; B29K; B29K2001/00; B29K2001/08; B29K2001/12; B29K2995/00; B29K2995/0018; B29K2995/002
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) | 1945-08-17 | 1946-02-16 | 1946-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1949-08-17 | 1950-02-16 | 1950-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1953-08-17 | 1954-02-16 | 1954-08-18 | $7700.00 | Window Closed / Lapsed |