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Patent US3493992A successfully refreshed from Google Patents.
US3493992A
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Apparatus for the precipitation of cellulose esters
Assignee: Rhodiatoce SpA
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Filing: 1968-05-29
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Granted: 1970-02-10
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Expires: 1988-05-29
Abstract
No abstract record available.
Inventors
- 👤 Giuseppe Garetto
- 👤 Clemente Canciani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:47
CPC Classifications
C; C08; C08B; C08B3/00; C08B3/22; C08B3/26; C08B3/28; B; B01; B01J; B01J2/00; B01J2/20; B29; B29B; B29B9/00; C08B17/00; C08B17/02; C08B17/04; C08B3/16
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) | 1973-02-09 | 1973-08-11 | 1974-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-09 | 1977-08-11 | 1978-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-09 | 1981-08-11 | 1982-02-10 | $7700.00 | Window Closed / Lapsed |