Patent US3498736A successfully refreshed from Google Patents.
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
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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 15:05
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)
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Cited
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FR1227817A
Cited
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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 |