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US3449058A
Expired / Lapsed
US
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Colored double-knit fabric material of cellulose organic acid ester having less than 0.29 free hydroxyl groups per anhydroglucose unit
Assignee: Celanese Corp
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Filing: 1965-01-07
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Granted: 1969-06-10
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Expires: 1985-01-07
Abstract
No abstract record available.
Inventors
- 👤 David H Hellman
- 👤 Joseph S Warner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 04:54
CPC Classifications
D; D06; D06P; D06P1/00; D06P1/44; D06P1/673; D06P1/67333; D06P1/6735; D06P1/67375; D06P1/90; D06P1/92; D06P1/928; D06P3/00; D06P3/34; D06P3/40; D06P3/46; D06P3/461; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/918; Y10S8/92; Y10S8/921; Y10S8/922; Y10S8/927; Y10S8/93; Y10S8/931; Y10S8/937
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |