US2639271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Styrene, alpha methyl styrene, drying oil modified alkyd resins
Assignee: Dow Chemical Co
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Filing: 1949-04-28
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Granted: 1953-05-19
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Expires: 1969-04-28
Abstract
No abstract record available.
Inventors
- 👤 Gerald A Griess
- 👤 Carl V Strandskov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:07
CPC Classifications
C; C09; C09D; C09D125/00; C09D125/02; C09D125/04; C09D125/08; C09D125/14; C08; C08F; C08F242/00; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F212/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
IN A METHOD OF MAKING A STYRENE-DRYING OIL MODIFIED ALKYD RESIN, THE STEP OF FORMING A PHTHALATE OF A TOLUENE-SOLUBLE INTERPOLYMER CONTAINING FREE HYDROXYL GROUPS RESULTING FROM THE INTERPOLYMERIZATION AND CONDENSATION OF FROM 30 TO 90 PARTS BY WEIGHT OF A DRYING OIL HAVING A DEGREE OF CONJUGATION NOT GREATER THAN 35 PER CENT, FROM 70 TO 10 PARTS OF A MIXTURE CONSISTING OF FROM 50 TO 80 PER CENT BY WEIGHT OF A MONOVINYL AROMATIC COMPOUND HAVING THE FORMULA:
Claim 2
Dependent Claim
80 words
IN A METHOD OF MAKING A STYRENE-DRYING OIL MODIFIED ALKYD RESIN, THE STEP OF FORMING A PHTHALATE OF A TOLUENE-SOLUBLE INTERPOLYMER CONTAINING FREE HYDROXYL GROUPS RESULTING FROM THE INTERPOLYMERIZATION AND CONDENSATION OF FROM 30 TO 90 PARTS BY WEIGHT OF A DRYING OIL HAVING A DEGREE OF CONJUGATION NOT GREATER THAN 35 PER CENT, FROM 70 TO 10 PARTS OF A MIXTURE CONSISTING OF FROM 50 TO 80 PER CENT BY WEIGHT OF A MONOVINYL AROMATIC COMPOUND HAVING THE FORMULA:
References Cited (Backward Citations)
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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) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |