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Patent US3135613A successfully refreshed from Google Patents.
US3135613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impregnated paper web and method of making sausage casings therefrom
Assignee: Union Carbide Corp
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Filing: 1959-08-17
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Granted: 1964-06-02
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Expires: 1979-08-17
Abstract
No abstract record available.
Inventors
- 👤 William F Underwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:53
CPC Classifications
A; A22; A22C; A22C13/00; A22C13/0013
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A POROUS PAPER WEB OF IMPROVED WET-STRENGTH COMPRISING ESSENTIALLY HEMP FIBERS IMPREGNATED AND BONDED TOGETHER WITH A REGENERATED CELLULOSE HAVING AN ALPHA CELLULOSE CONTENT OF AT LEAST 93 PERCENT BY WEIGHT AND A CUPRIETHYLENE DIAMINE VISCOSITY OF AT LEAST 4.2 CENTIPOISES AS DETERMINED BY TAPPI TEST METHOD T230-SM-50, AND WHEREIN SAID REGENERATED CELLULOSE IS PRESENT IN AN AMOUNT WHICH ESSENTIALLY MAINTAINS THE POROSITY OF SAID PAPER WEB.
Claim 2
Dependent Claim
67 words
A POROUS PAPER WEB OF IMPROVED WET-STRENGTH COMPRISING ESSENTIALLY HEMP FIBERS IMPREGNATED AND BONDED TOGETHER WITH A REGENERATED CELLULOSE HAVING AN ALPHA CELLULOSE CONTENT OF AT LEAST 93 PERCENT BY WEIGHT AND A CUPRIETHYLENE DIAMINE VISCOSITY OF AT LEAST 4.2 CENTIPOISES AS DETERMINED BY TAPPI TEST METHOD T230-SM-50, AND WHEREIN SAID REGENERATED CELLULOSE IS PRESENT IN AN AMOUNT WHICH ESSENTIALLY MAINTAINS THE POROSITY OF SAID PAPER WEB.
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |