Patent US3709720A successfully refreshed from Google Patents.
US3709720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for coating a tube of fiber material with viscose by extrusion
Assignee: Individual
•
Filing: 1970-12-23
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Granted: 1973-01-09
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Expires: 1990-12-23
Abstract
Abstract THIS INVENTION RELATES TO A PROCESS AND APPARATUS FOR THE CONTINUOUS COATING OF A TUBE OF FIBER MATERIALS WITH VISCOSE, THE PROCESS COMPRISING CONVEYING THE TUBE SO THAT ITS WALL TRAVERSES A CYLINDRICAL ZONE OF A WIDTH OF 0.3 TO 1.0 MM. DEFINED BY EXTERNAL AND INTERNAL ELEMENTS, AND IN ITS PROGRESS THROUGH SAID ZONE IS COATED WITH VISCOSE FIRST ON THE EXTERIOR AND THEN ON THE INTERIOR THEEREOF.
Inventors
- 👤 E Kindl
- 👤 G Gerigk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:18
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/15; B29C48/151; B29C48/152; B29C48/153; A; A22; A22C; A22C13/00; A22C2013/002; B29C48/03; B29C48/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |