Patent US4124657A successfully refreshed from Google Patents.
Patent US3772073A successfully refreshed from Google Patents.
US3772073A
Expired / Lapsed
US
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Paper coated with a composition comprising pigments and styrene-acrolein polymers
Assignee: ChampionX LLC
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Filing: 1973-01-30
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Granted: 1973-11-13
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Expires: 1993-01-30
Abstract
Abstract Acrolein-styrene polymers have been found effective as coatings in imparting water resistance to pigmented paper. Paper is coated with a dried residue of a composition comprising water, clay, water soluble materials such as polyvinyl alcohol, hydrolyzed polyvinyl acetate, methyl cellulose, and starch; and a polymer formed by the polymerization of by weight: A. from 5 to 60 percent acrolein, B. from 40 to 95 percent styrene, C. from 0 to 40 percent acrylonitrile and D. from 0 to 2 percent acrylic acid.
Inventors
- 👤 D Holty
- 👤 G Kekish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:48
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/36; D21H19/44; D21H19/56; D21H19/58; C; C09; C09D; C09D125/00; C09D125/02; C09D125/04; C09D125/08; C09D129/00; C09D129/12; C08; C08L; C08L29/00; C08L29/02; C08L29/04; C08L3/00; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906
Claims Analysis
Total Claims: 0
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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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |