US4980024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antiskid paper with enhanced friction retention
Assignee: ChampionX LLC
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Filing: 1989-05-15
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Granted: 1990-12-25
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Expires: 2009-05-15
Abstract
Abstract Superiority in retained slide angle of antiskid paper is achieved by spraying the paper with a composition of matter consisting essentially of an acrylamide, glycerine, balance antiskid aqueous silica sol.
Inventors
- 👤 Charles C. Payne
- 👤 Raymond J. Novotny
- 👤 Roger H. Jansma
- 👤 Neil A. Marron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:37
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/03; D21H17/05; D21H17/06; D21H17/20; D21H17/33; D21H17/34; D21H17/37; D21H19/00; D21H19/36; D21H19/44; D21H19/46; D21H19/56; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
51 words
A method of reducing slide angle loss for antiskid paper products consisting of the step of coating the paper with a composition of matter consisting essentially of about two percent by weight glycerine, five percent by weight polyacrylamide of molecular weight about 10,000 to 30,000, balance substantially aqueous antiskid silica sol.
Claim 2
Independent Claim
51 words
A method of reducing slide angle loss for antiskid paper products consisting of the step of coating the paper with a composition of matter consisting essentially of about two percent by weight glycerine, five percent by weight polyacrylamide of molecular weight about 10,000 to 30,000, balance substantially aqueous antiskid silica sol.
Claim 3
Dependent Claim
21 words
Method according to claim 1 in which the average particle size of the silica solids is about 5 to 120 nanometers.
Claim 4
Dependent Claim
31 words
Method according to claim 2 in which the weight percent solids in the silica sol is about 40 and in which the average particle size is about 40 to 70 nanometers.
Claim 5
Dependent Claim
49 words
Paper product coated with a composition of matter for enhancing the slide angle retention of the paper product, said composition of matter consisting essentially of about two percent by weight glycerine, five percent by weight polyacrylamide of molecular weight about 10,000 to 30,000, balance substantially aqueous antiskid silica sol.
Claim 6
Dependent Claim
49 words
Paper product coated with a composition of matter for enhancing the slide angle retention of the paper product, said composition of matter consisting essentially of about two percent by weight glycerine, five percent by weight polyacrylamide of molecular weight about 10,000 to 30,000, balance substantially aqueous antiskid silica sol.
Claim 7
Dependent Claim
22 words
Paper product according to claim 3 in which the average particle size of the silica solids is about 5 to 120 nanometers.
Claim 8
Dependent Claim
32 words
Paper product according to claim 5 in which the weight percent solids in the silica sol is about 40 and in which the average particle size is about 40 to 70 nanometers.
References Cited (Backward Citations)
US3860431A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-24 | 1994-06-25 | 1994-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-24 | 1998-06-25 | 1998-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-24 | 2002-06-25 | 2002-12-25 | $7700.00 | Window Closed / Lapsed |