US2702230A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulose acetate spinning process
Assignee: Celanese Corp
•
Filing: 1950-11-24
•
Granted: 1955-02-15
•
Expires: 1970-11-24
Abstract
No abstract record available.
Inventors
- 👤 Francois J Olmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:15
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/24; D01F2/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1119155A
Cited
US1456781A
Cited
US1906041A
Cited
US1920188A
Cited
US2075027A
Cited
US2075430A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-02-14 | 1958-08-16 | 1959-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-14 | 1962-08-16 | 1963-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-14 | 1966-08-16 | 1967-02-15 | $7700.00 | Window Closed / Lapsed |