US2941968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water dispersible interpolymers
Assignee: PPG Industries Inc
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Filing: 1954-11-03
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Granted: 1960-06-21
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Expires: 1974-11-03
Abstract
No abstract record available.
Inventors
- 👤 James F Mckenna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:58
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C09; C09D; C09D125/00; C09D125/02; C09D125/04; C09D125/08; C09D125/14; C08F212/12; C08F222/00; C08F222/04; C08F222/06; C08F222/08; C08F222/10; C08F222/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
IN A METHOD OF FORMING A WATER DISPERSIBLE MATERIAL WHICH WHEN SPREAD AS A FILM, WILL DRY TO A HARD, WATERRESISTANT STATE, THE STEPS OF HEATING TO A TEMPERATURE OF ABOUT 175*C. TO ABOUT 300*C., A MIXTURE CONSISTING ESSENTIALLY OF GLYCERIDE DRYING OIL AND 5 TO 40 PERCENT BY WEIGHT OF MALEIC ANYHDRIDE, WHEREBY TO EFFECT ADDITION REACTION BETWEEN THE TWO, BREAKING THE ANHYDRIDE, RINGS BY ADDING WATER AND HYDROLYZING THE PRODUCT BY REFLUXING THE MIXTURE, NEUTRALIZING THE HYDROLYZED PRODUCT WITH AMMONIUM HYDROXIDE TO FORM A MIXTURE CONSISTING ESSENTIALLY OF THE NEUTRALIZED PRODUCT, ADDING TO THE NEUTRALIZED PRODUCT ABOUT 20 TO ABOUT 70 PERCENT BY WEIGHT OF A MATERIAL OF THE CLASS CONSISTING OF STYRENE, VINYL TOLUENE AND ALPHA METHYL STYRENE, AND HEATING THE MIXTURE AT A TEMPERATURE OF ABOUT 20*C. TO ABOUT 100*C. UNTIL A LIQUID INTERPOLYMER, WHICH IS SAID WATER DISPERSIBLE MATERIAL, IS FORMED.
Claim 2
Dependent Claim
146 words
IN A METHOD OF FORMING A WATER DISPERSIBLE MATERIAL WHICH WHEN SPREAD AS A FILM, WILL DRY TO A HARD, WATERRESISTANT STATE, THE STEPS OF HEATING TO A TEMPERATURE OF ABOUT 175*C. TO ABOUT 300*C., A MIXTURE CONSISTING ESSENTIALLY OF GLYCERIDE DRYING OIL AND 5 TO 40 PERCENT BY WEIGHT OF MALEIC ANYHDRIDE, WHEREBY TO EFFECT ADDITION REACTION BETWEEN THE TWO, BREAKING THE ANHYDRIDE, RINGS BY ADDING WATER AND HYDROLYZING THE PRODUCT BY REFLUXING THE MIXTURE, NEUTRALIZING THE HYDROLYZED PRODUCT WITH AMMONIUM HYDROXIDE TO FORM A MIXTURE CONSISTING ESSENTIALLY OF THE NEUTRALIZED PRODUCT, ADDING TO THE NEUTRALIZED PRODUCT ABOUT 20 TO ABOUT 70 PERCENT BY WEIGHT OF A MATERIAL OF THE CLASS CONSISTING OF STYRENE, VINYL TOLUENE AND ALPHA METHYL STYRENE, AND HEATING THE MIXTURE AT A TEMPERATURE OF ABOUT 20*C. TO ABOUT 100*C. UNTIL A LIQUID INTERPOLYMER, WHICH IS SAID WATER DISPERSIBLE MATERIAL, IS FORMED.
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) | 1963-06-21 | 1963-12-21 | 1964-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-21 | 1967-12-21 | 1968-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-21 | 1971-12-21 | 1972-06-21 | $7700.00 | Window Closed / Lapsed |