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US 4,129,679 AGranted
Multi-limbed regenerated cellulose filaments
AssigneeCourtaulds Limited
InventorCalvin R. Woodings
Life of this patent
Estimating the term…
Abstract
Highly absorbent regenerated cellulose filaments have a collapsed hollow structure, a multi-limbed cross-section and a water imbibition of 170 to 345 per cent. They are made by a viscose process using sodium carbonate as an inflating agent.
Claims2
A bundle of highly absorbent, regenerated cellulose filaments, substantially all of the filaments of said bundle having a collapsed hollow structure, and at least 60 percent of said filaments comprising in cross-section at least three elongated limbs extending from a common origin, the water imbibition of said bundle being from 170 to 345 percent.
Dependencies are inferred from the claim text.