Patent US2142743A successfully refreshed from Google Patents.
US3423167A
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US
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Wet state cross-linking of carboxyalkyl cellulose ether modified regenerated cellulose fibers
Assignee: FMC Corp
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Filing: 1964-12-15
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Granted: 1969-01-21
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Expires: 1984-12-15
Abstract
No abstract record available.
Inventors
- 👤 Joseph M Kuzmak
- 👤 Wenceslao Munoz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:12
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/248; D06M13/272; D06M13/278; A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; D06M13/10; D06M13/11; D06M13/12; D06M13/127; D06M13/184; D06M13/203; D06M13/207; D06M13/21
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB335605A
Cited
GB523566A
Cited
US2796656A
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US2724633A
Cited
US2902391A
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US2971815A
Cited
US3038777A
Cited
GB980980A
Cited
US3293071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |