US3202625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for water base paints
Assignee: Shell USA Inc
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Filing: 1961-06-02
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Granted: 1965-08-24
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Expires: 1981-06-02
Abstract
No abstract record available.
Inventors
- 👤 Roy W Tess
- 👤 Paul R Van Ess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:19
CPC Classifications
C; C09; C09D; C09D131/00; C09D131/02; C08; C08F; C08F18/00; C08F18/02; C08F18/04; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1802
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
114 words
A METHOD OF MAKING A STABLE LATEX COMPRISING COPOLYMERIZING A MONOMERIC MIXTURE CONSISTING ESSENTIALLY OF (1) FROM ABOUT 4% TO ABOUT 50% BY WEIGHT OF TOTAL MONOMER OF VINYL PIVALATE, (2) FROM ABOUT 49.5 TO 95.5% BY WEIGHT OF TOTAL MONOMER OF AN ALKYL ACRYLATE HAVING FROM 4 TO 12 CARBON ATOMS, AND (3) FROM ABOUT 0.5 TO 5% BY WEIGHT OF TOTAL MONOMER OF AN ALPHA-BETAVINYLIDENE CARBOXYLIC ACID IN AN AQUEOUS EMULSION CONTAINING AN ANIONIC EMULSIFIER AT A TEMPERATURE BETWEEN ABOUT 0*C. AND 90*C. USING A FREE RADICAL CATALYST, STABILIZING SAID EMULSION BY THE ADDITION OF A NONIONIC EMULSIFIER, AND ADJUSTING THE PH TO A VALUE BETWEEN 8 AND 11 WITH AMMONIUM HYDROXIDE.
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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |