Patent US2850469A successfully refreshed from Google Patents.
US2850469A
Expired / Lapsed
US
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Soluble interpolymers of ethylenic monomers and polyesters of alphabeta ethylenic polycarboxylic acids
Assignee: PPG Industries Inc
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Filing: 1953-02-03
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Granted: 1958-09-02
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Expires: 1973-02-03
Abstract
No abstract record available.
Inventors
- 👤 Roger M Christenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:56
CPC Classifications
C; C08; C08F; C08F283/00; C08F283/01; C09; C09D; C09D151/00; C09D151/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
THE METHOD OF PREPARING A SOLUBLE, UNGELLED INTERPOLYMER, WHICH COMPRISES DISSOLVING IN A SOLVENT THEREOF (A) A DIESTER WHICH IS OF AN ACID VALUE BELOW ABOUT 15 AND WHICH IS THE ESTERIFICATION PRODUCT OF (1) ABOUT 1 MOLE OF DICARBOXYLIC ACID AT LEAST 80 PERCENT BY WEIGHT OF WHICH IS ALPHA-BETA ETHYLENIC AND ANY RESIDUE OF WHICH IS SATURATED AND (2) ABOUT 2 MOLES OF A MONO-HYDRIC ESTER OF A POLYHYDRIC ALCOHOL AND A DRYING GLYCERIDE OIL FATTY ACID AND (B) A LIQUID POLYMERIZABLE MONOMER CONTAINING A SINGLE >C=CH2 GROUP AND HEATING THE MIXTURE TO THE REFLUX TEMPERATURE OF THE SOLVENT.
Claim 2
Independent Claim
101 words
THE METHOD OF PREPARING A SOLUBLE, UNGELLED INTERPOLYMER, WHICH COMPRISES DISSOLVING IN A SOLVENT THEREOF (A) A DIESTER WHICH IS OF AN ACID VALUE BELOW ABOUT 15 AND WHICH IS THE ESTERIFICATION PRODUCT OF (1) ABOUT 1 MOLE OF DICARBOXYLIC ACID AT LEAST 80 PERCENT BY WEIGHT OF WHICH IS ALPHA-BETA ETHYLENIC AND ANY RESIDUE OF WHICH IS SATURATED AND (2) ABOUT 2 MOLES OF A MONO-HYDRIC ESTER OF A POLYHYDRIC ALCOHOL AND A DRYING GLYCERIDE OIL FATTY ACID AND (B) A LIQUID POLYMERIZABLE MONOMER CONTAINING A SINGLE >C=CH2 GROUP AND HEATING THE MIXTURE TO THE REFLUX TEMPERATURE OF THE SOLVENT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-01 | 1962-03-03 | 1962-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-01 | 1966-03-03 | 1966-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-01 | 1970-03-03 | 1970-09-02 | $7700.00 | Window Closed / Lapsed |