US3498736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inhibiting cellulose fiber yellowing in alkaline processing at elevated temperatures through utilization of boron salts
Assignee: GAF Corp
•
Filing: 1961-03-20
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Granted: 1970-03-03
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Expires: 1981-03-20
Abstract
No abstract record available.
Inventors
- 👤 Harlan B Freyermuth
- 👤 Raymond L Mayhew
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:47
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/68; D06M11/70; D06M11/71; D06M11/01; D06M11/80; D06M11/81; D06M11/82; D06M13/00; D06M13/244; D06M13/248; D06M13/272; D06M13/278; D06P; D06P3/00; D06P3/58; D06P3/60; D06P3/66; Y; Y10; Y10S; Y10S8/00; Y10S8/916; Y10S8/917
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
IN A METHOD FOR IMPROVING CELLULOSE FIBROUS MATERIAL WOTHOUT DESTROYING ITS FIBER STRUCTURE COMPRISING: (1) TREATING SUCH MATERIAL WITH AN AQUEOUS TREATING MEDIUM (A) RENDERED ALKALINE WITH A MEMBER OF THE GROUP CONSISTING OF ALKALI METAL HYDROXIDES, CARBONATES, BICARBONATES, AND PHOSPHATES, AND CONTAINING (B) A FIBER-TREATING AGENT SELECTED FROM THE GROUP CONSISTING OF CREASEPROOFING AGENTS AND DYESTUFFS REACTIVE WITH THE FIBER UNDER DRY ALKALINE CONDITIONS AT TEMPERATURES OF AT LEAST ABOUT 250*F., AND THEN (2) DRYING, AND (3) HEATING THE TREATED FIBROUS MATERIAL AT SAID TEMPERATUREWS, THE IMPROVEMENT COMPRISING INCLUDING IN SAID TREATING MEDIUM ABOUT 0.03 TO 5.0% BY WEIGHT OF A BRON-CONTAINING COMPOUND SELECTED FROM THE GROUP C ONSISTING OF ALKALI METAL AND AMMONIUM BORATES AND BOROHYDRIDES.
Claim 2
Dependent Claim
118 words
IN A METHOD FOR IMPROVING CELLULOSE FIBROUS MATERIAL WOTHOUT DESTROYING ITS FIBER STRUCTURE COMPRISING: (1) TREATING SUCH MATERIAL WITH AN AQUEOUS TREATING MEDIUM (A) RENDERED ALKALINE WITH A MEMBER OF THE GROUP CONSISTING OF ALKALI METAL HYDROXIDES, CARBONATES, BICARBONATES, AND PHOSPHATES, AND CONTAINING (B) A FIBER-TREATING AGENT SELECTED FROM THE GROUP CONSISTING OF CREASEPROOFING AGENTS AND DYESTUFFS REACTIVE WITH THE FIBER UNDER DRY ALKALINE CONDITIONS AT TEMPERATURES OF AT LEAST ABOUT 250*F., AND THEN (2) DRYING, AND (3) HEATING THE TREATED FIBROUS MATERIAL AT SAID TEMPERATUREWS, THE IMPROVEMENT COMPRISING INCLUDING IN SAID TREATING MEDIUM ABOUT 0.03 TO 5.0% BY WEIGHT OF A BRON-CONTAINING COMPOUND SELECTED FROM THE GROUP C ONSISTING OF ALKALI METAL AND AMMONIUM BORATES AND BOROHYDRIDES.
References Cited (Backward Citations)
CA625790A
Cited
US3046075A
Cited
US1844718A
Cited
FR1227817A
Cited
US3218118A
Cited
US3042575A
Cited
US3222119A
Cited
US3100732A
Cited
US3178250A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |