Patent US2431457A successfully refreshed from Google Patents.
US3423232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of vinylidene chloride polymer coatings on flat substrates based on cellulose
Assignee: BASF SE
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Filing: 1966-01-17
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Granted: 1969-01-21
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Expires: 1986-01-17
Abstract
No abstract record available.
Inventors
- 👤 Hans Reinhard
- 👤 Friedrich Hoelscher
- 👤 Bernhard Dotzauer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:34
CPC Classifications
D; D21; D21H; D21H19/00; D21H19/80; D21H19/82; D21H19/824; C; C09; C09D; C09D127/00; C09D127/02; C09D127/04; C09D127/08; D21H19/10; D21H19/14; D21H19/20; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31906; Y10T428/31909; Y10T428/31924; Y10T428/31928
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
165 words
IN A METHOD FOR THE PRODUCTION OF COATINGS ON FLAT SUBSTRATES BASED ON A CELLULOSE BY APPLYING AN AQUEOUS POLYMER DISPERSION AS A SUBCOAT AND DRYING THE SAME, APPLYING AN AQUEOUS DISPERSION OF A COPOLYMER OF 80 TO 98% BY WEIGHT OF VINYLIDENE CHLORIDE AND 2 TO 20% BY WEIGHT OF COPOLYMERIZABLE MONOETHYLENICALLY UNSATURATED COMPOUNDS AS A TOPCOAT AND DRYING THE SAME THE IMPROVEMENT WHICH COMPRISES USING AS AQUEOUS POLYMER DISPERSION FOR THE SUBCOAT A MIXTURE OF: (I) AN AQUEOUS DISPERSION OF A COPOLYMER A OF 80 TO 98% BY WEIGHT OF VINYLIDENE CHLORIDE AND 2 TO 20% BY WEIGHT OF COPOLYMERIZABLE MONOETHYLENICALLY UNSATURATED COMPOUNDS, AND (II) AN AQUEOUS DISPERSION OF A POLYMER OF ETHYLENICALLY UNSATURATED COMPOUNDS B HAVING A GLASS TRANSITION TEMPERATURE OF +10* TO -55*C., THE AMOUNT OF THE COPOLYMER A BEING ABOUT 35 TO 90% AND THE AMOUNT OF THE POLYMER B BEING ABOUT 10 TO 65% OF THE WEIGHT OF THE SUM OF THE POLYMERS A AND B IN THE MIXTURE.
Claim 2
Dependent Claim
165 words
IN A METHOD FOR THE PRODUCTION OF COATINGS ON FLAT SUBSTRATES BASED ON A CELLULOSE BY APPLYING AN AQUEOUS POLYMER DISPERSION AS A SUBCOAT AND DRYING THE SAME, APPLYING AN AQUEOUS DISPERSION OF A COPOLYMER OF 80 TO 98% BY WEIGHT OF VINYLIDENE CHLORIDE AND 2 TO 20% BY WEIGHT OF COPOLYMERIZABLE MONOETHYLENICALLY UNSATURATED COMPOUNDS AS A TOPCOAT AND DRYING THE SAME THE IMPROVEMENT WHICH COMPRISES USING AS AQUEOUS POLYMER DISPERSION FOR THE SUBCOAT A MIXTURE OF: (I) AN AQUEOUS DISPERSION OF A COPOLYMER A OF 80 TO 98% BY WEIGHT OF VINYLIDENE CHLORIDE AND 2 TO 20% BY WEIGHT OF COPOLYMERIZABLE MONOETHYLENICALLY UNSATURATED COMPOUNDS, AND (II) AN AQUEOUS DISPERSION OF A POLYMER OF ETHYLENICALLY UNSATURATED COMPOUNDS B HAVING A GLASS TRANSITION TEMPERATURE OF +10* TO -55*C., THE AMOUNT OF THE COPOLYMER A BEING ABOUT 35 TO 90% AND THE AMOUNT OF THE POLYMER B BEING ABOUT 10 TO 65% OF THE WEIGHT OF THE SUM OF THE POLYMERS A AND B IN THE MIXTURE.
References Cited (Backward Citations)
US2748027A
Cited
US3307965A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-21 | 1972-07-22 | 1973-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-21 | 1976-07-22 | 1977-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-21 | 1980-07-22 | 1981-01-21 | $7700.00 | Window Closed / Lapsed |