Patent US3045461A successfully refreshed from Google Patents.
US3045461A
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US
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Apparatus for acetylating cellulose fibers in gaseous phase
Assignee: Teijin Ltd
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Filing: 1960-07-01
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Granted: 1962-07-24
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Expires: 1980-07-01
Abstract
No abstract record available.
Inventors
- 👤 Saito Shigeru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:14
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/10; D06M13/184; D06M13/188; C; C08; C08B; C08B17/00; C08B17/02; Y; Y10; Y10S; Y10S8/00; Y10S8/15
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) | 1965-07-23 | 1966-01-22 | 1966-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-23 | 1970-01-22 | 1970-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-23 | 1974-01-22 | 1974-07-24 | $7700.00 | Window Closed / Lapsed |