US3529044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of inorganic fibrous materials
Assignee: Celanese Corp
•
Filing: 1968-02-28
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Granted: 1970-09-15
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Expires: 1988-02-28
Abstract
No abstract record available.
Inventors
- 👤 Joseph G Santangelo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:17
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/62227; C04B35/62231; C04B35/62259; C01; C01B; C01B32/00; C01B32/90; C04B35/01; C04B35/10; C04B35/111; C04B35/117; C04B35/14; C04B35/48; C04B35/486; C04B35/488; C04B35/62236; C04B35/626; C04B35/62605; C04B35/62645; C04B35/6265; C04B35/6267; C04B35/62675; C04B35/63; C04B35/632; C04B35/634; C04B35/63448; C04B35/63468; C04B35/71; C04B35/78; C04B35/80; D; D01; D01F; D01F11/00; D01F11/10; D01F11/12; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01F9/20; D01F9/24; D01F9/28; C01P; C01P2004/00; C01P2004/10; C01P2006/00; C01P2006/80; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3217; C04B2235/3231; C04B2235/3232; C04B2235/34; C04B2235/3409; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 0
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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) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |