US3384535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for fibrillating polyamide-containing fibers with an acid swelling agent
Assignee: Viscosuisse SA
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Filing: 1967-05-23
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Granted: 1968-05-21
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Expires: 1987-05-23
Abstract
No abstract record available.
Inventors
- 👤 Bruno S V Marek
- 👤 Gneisz Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:45
CPC Classifications
D; D21; D21H; D21H5/00; D21H5/12; D21H5/1236; D02; D02J; D02J3/00; D02J3/02; D21H11/00; D21H11/16; D21H11/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2558730A
Cited
US3084020A
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US3097991A
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US2999788A
Cited
US3052593A
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US3098786A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-21 | 1971-11-20 | 1972-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-21 | 1975-11-20 | 1976-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-21 | 1979-11-20 | 1980-05-21 | $7700.00 | Window Closed / Lapsed |