Patent US3918981A successfully refreshed from Google Patents.
US3918981A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fungicidal dispersion, paper and process
Assignee: United States Gypsum Co
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Filing: 1974-07-22
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Granted: 1975-11-11
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Expires: 1994-07-22
Abstract
Abstract Paper sheets, such as for use as the cover sheet of gypsum wallboard and the like, are rendered mildew-resistant by adding to the paper at the calender stack rolls an aqueous dispersion containing a heavy metal salt of quinolinolate, a paper coating binder and a colloidal suspending agent. A particularly preferred aqueous dispersion contains about 5-40% of a 30% active copper-8quinolinolate paste concentrate; about 3-30% of a wax binder, preferably about 5-60% of an about 50% active wax emulsion such as of PARACOL 404 R; and a small amount of a generally nonthickening colloidal suspending agent preferably a xanthan gum.
Inventors
- 👤 William Joseph Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:11
CPC Classifications
D; D21; D21H; D21H21/00; D21H21/14; D21H21/36
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
76 words
A STORAGE STABLE, AQUEOUS DISPERSION OF A GENERALLY WATERINSOLUBLE METAL QUINOLINOLATE SALT CONSISTING ESSENTIALLY OF BY WEIGHT A FUNGICIDALLY EFFECTIVE AMOUNT OF A METAL SALT OF A HYDROXYQUINOLINE: WATER AND ABOUT 2 TO ABOUT 40% OF A BINDER EMULSION SELECTED FROM THE GROUP CONSISTING OF A WAX, ROSIN ACRYLIC, STYRENE, BUTADINENE-STYRENE, BUTADIENE-ACRYLONITRILE AND POLYETHYLENE: AND A MINOR EFFECTICE AMOUNT OF COLLOIDAL SUSPENDING AGENT SELECTED FROM THE GROUP CONSISTING OF XANTHAN GUM, METHYL-CELLULOSE, CARBOXYETHYLCELLULOSE, AND AN ALGINATE.
Claim 2
Dependent Claim
76 words
A STORAGE STABLE, AQUEOUS DISPERSION OF A GENERALLY WATERINSOLUBLE METAL QUINOLINOLATE SALT CONSISTING ESSENTIALLY OF BY WEIGHT A FUNGICIDALLY EFFECTIVE AMOUNT OF A METAL SALT OF A HYDROXYQUINOLINE: WATER AND ABOUT 2 TO ABOUT 40% OF A BINDER EMULSION SELECTED FROM THE GROUP CONSISTING OF A WAX, ROSIN ACRYLIC, STYRENE, BUTADINENE-STYRENE, BUTADIENE-ACRYLONITRILE AND POLYETHYLENE: AND A MINOR EFFECTICE AMOUNT OF COLLOIDAL SUSPENDING AGENT SELECTED FROM THE GROUP CONSISTING OF XANTHAN GUM, METHYL-CELLULOSE, CARBOXYETHYLCELLULOSE, AND AN ALGINATE.
Claim 3
Dependent Claim
11 words
The dispersion of claim 1 which the hydroxyquinoline salt is copper-8-quinolinolate.
Claim 4
Dependent Claim
13 words
The dispersion of claim 1 in which the colloidal agent is xanthan gum.
Claim 5
Dependent Claim
21 words
The dispersion of claim 3 in which the xanThan gum is present in an amount of about 0.1 to about 1%.
Claim 6
Dependent Claim
40 words
The dispersion of claim 1 in which the hydroxyquinoline quinolinol salt is in the form of an aqueous dispersion paste containing about 30% active copper-8-quinolinolate and is present in the dispersion in an amount of about 5 to about 40%.
Claim 7
Dependent Claim
58 words
A storage stable aqueous dispersion of water-insoluble quinolinolate comprising by weight about 5 to about 40% of a paste dispersion concentrate of quinolinolate salt containing about 30% active copper-8-quinolinolate; about 5 to about 60% of an aqueous wax emulsion containing about 47% solids of a fully refined paraffin wax; and about 0.l to about 1% of xanthan gum.
Claim 8
Dependent Claim
58 words
A storage stable aqueous dispersion of water-insoluble quinolinolate comprising by weight about 5 to about 40% of a paste dispersion concentrate of quinolinolate salt containing about 30% active copper-8-quinolinolate; about 5 to about 60% of an aqueous wax emulsion containing about 47% solids of a fully refined paraffin wax; and about 0.l to about 1% of xanthan gum.
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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |