Patent US3012844A successfully refreshed from Google Patents.
US3012844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cellulosic material
Assignee: Akzo Nobel UK PLC
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Filing: 1955-03-28
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Granted: 1961-12-12
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Expires: 1975-03-28
Abstract
No abstract record available.
Inventors
- 👤 Joseph J Screnock
- 👤 Fivel C Brenner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:15
CPC Classifications
D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/10; D01; D01F; D01F2/00; D01F2/06; D06M; D06M11/00; D06M11/07; D06M11/11; D06M11/13; D06M11/155; D06M11/51; D06M11/54; D06M11/55; D06M11/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 words
AS A ARTICLE OF MANUFACTURE, REGENERATED CELLULOSE FIBERS RESISTANT TO DISCOLORATION WHEN SAID FIBERS ARE SUBJECTED TO ELEVATED TEMPERATURES AND CONTAINING COMBINED WITH THE REGENERATED CELLULOSE A METAL SELECTED FROM THE GROUP CONSISTING OF METALS OF GROUP IA OF THE PERIODIC TABLE AND HAVING AN ATOMIC NUMBER OF AT LEAST 11 AND THE METALS OF GROUP IIA OF THE PERIODIC TABLE HAVING AN ATOMIC NUMBER OF AT LEAST 20, SAID FIBERS HAVING BEEN FORMED BY IMPREGNATING WITH AN AQUEOUS SOLUTION HAVING A PH OF BETWEEN ABOUT 6 AND 8 OF AN IONIZABLE, COLORLESS, WATERED FROM THE GROUP CONSISTING OF SULFATE, BISULFATE, CHLORIDE, BROMIDE, ACETATE AND NITRATE IONS, SAID SOLUTION BEING FORMED BY DISSOLVING IN WATER A SUFFICIENT AMOUNT OF SAID IONIZABLE SALT TO FORM THE SOLUTION HAVING A PH OF BETWEEN ABOUT 6 AND 8, DRYING SAID FIBERS IN THE PRESENCE OF SAID METALLIC ION, THE DRIED REGENERATED CELLULOSE FIBERS HAVING BEEN SUBJECTED TO STEAM STERILIZATION SUBSEQUENT TO DRYING.
Claim 2
Dependent Claim
159 words
AS A ARTICLE OF MANUFACTURE, REGENERATED CELLULOSE FIBERS RESISTANT TO DISCOLORATION WHEN SAID FIBERS ARE SUBJECTED TO ELEVATED TEMPERATURES AND CONTAINING COMBINED WITH THE REGENERATED CELLULOSE A METAL SELECTED FROM THE GROUP CONSISTING OF METALS OF GROUP IA OF THE PERIODIC TABLE AND HAVING AN ATOMIC NUMBER OF AT LEAST 11 AND THE METALS OF GROUP IIA OF THE PERIODIC TABLE HAVING AN ATOMIC NUMBER OF AT LEAST 20, SAID FIBERS HAVING BEEN FORMED BY IMPREGNATING WITH AN AQUEOUS SOLUTION HAVING A PH OF BETWEEN ABOUT 6 AND 8 OF AN IONIZABLE, COLORLESS, WATERED FROM THE GROUP CONSISTING OF SULFATE, BISULFATE, CHLORIDE, BROMIDE, ACETATE AND NITRATE IONS, SAID SOLUTION BEING FORMED BY DISSOLVING IN WATER A SUFFICIENT AMOUNT OF SAID IONIZABLE SALT TO FORM THE SOLUTION HAVING A PH OF BETWEEN ABOUT 6 AND 8, DRYING SAID FIBERS IN THE PRESENCE OF SAID METALLIC ION, THE DRIED REGENERATED CELLULOSE FIBERS HAVING BEEN SUBJECTED TO STEAM STERILIZATION SUBSEQUENT TO DRYING.
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) | 1964-12-11 | 1965-06-12 | 1965-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-12-11 | 1969-06-12 | 1969-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-12-11 | 1973-06-12 | 1973-12-12 | $7700.00 | Window Closed / Lapsed |