US2398856A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the treatment of artificial materials
Assignee: Celanese Corp
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Filing: 1942-10-22
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Granted: 1946-04-23
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Expires: 1962-10-22
Abstract
No abstract record available.
Inventors
- 👤 Raymond D Reel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:56
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/74; D; D01; D01D; D01D10/00; D01D10/04; D01D10/0436; D01D10/0481; D01D5/00; D01D5/12; D01D5/14; D01F; D01F2/00; D01F2/24; D01F2/28; D02; D02J; D02J1/00; D02J1/22; D02J1/222; D02J1/225; D02J1/227; Y; Y10; Y10S; Y10S264/00; Y10S264/28
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) | 1949-04-22 | 1949-10-22 | 1950-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1953-04-22 | 1953-10-22 | 1954-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1957-04-22 | 1957-10-22 | 1958-04-23 | $7700.00 | Window Closed / Lapsed |