US3649348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paper frictionizing
Assignee: ChampionX LLC
•
Filing: 1969-07-24
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Granted: 1972-03-14
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Expires: 1989-07-24
Abstract
Abstract A paper composition having excellent antiskid properties consisting of paper coated with large particle diameter colloidal silica sol. The particle diameters used must be at least 60 millimicrons.
Inventors
- 👤 Peter H Vossos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:33
CPC Classifications
D; D21; D21H; D21H27/00; D21H19/00; D21H19/36; D21H19/38; D21H19/40; D21H5/00; D21H5/0072; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/259
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
18 words
The coated paper of claim 1 where the particle diameter size of the silica sol is 68-100 millimicrons.
References Cited (Backward Citations)
CA495662A
Cited
US2643048A
Cited
US2577485A
Cited
US2833661A
Cited
US2801938A
Cited
US2872094A
Cited
US2980558A
Cited
US3440174A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |