Patent US3419345A successfully refreshed from Google Patents.
US3419345A
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Neutralization of hydrophilic gel fibers of a cellulose derivative
Assignee: EIDP Inc
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Filing: 1966-05-04
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Granted: 1968-12-31
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Expires: 1986-05-04
Abstract
No abstract record available.
Inventors
- 👤 Parrish Esperanza Guandique
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:57
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/07; D06M11/11; D06M11/155; A; A61; A61F; A61F13/00; A61F13/15; A61F13/15203; A61F13/15211; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; D01; D01F; D01F11/00; D01F11/02; D01F2/00; D01F2/24; D01F2/28; A61F13/53; A61F2013/530481; A61F13/84; A61F2013/8488
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2472877A
Cited
US2479605A
Cited
US2902334A
Cited
US3194861A
Cited
US3146116A
Cited
US3154614A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-31 | 1972-07-01 | 1972-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-31 | 1976-07-01 | 1976-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-31 | 1980-07-01 | 1980-12-31 | $7700.00 | Window Closed / Lapsed |