US2587578A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of phenolic resins that produce light-colored varnish coatings
Assignee: Libbey Owens Ford Glass Co
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Filing: 1947-02-19
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Granted: 1952-03-04
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Expires: 1967-02-19
Abstract
No abstract record available.
Inventors
- 👤 Jones John Leslie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:20
CPC Classifications
C; C09; C09D; C09D161/00; C09D161/04; C09D161/06; C08; C08G; C08G16/00; C08G16/02; C08G16/0212; C08G16/0218; C08G8/00; C08G8/04; C08G8/08; C08G8/12; C08G8/28; C08G8/34
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A METHOD OF PREPARING A RESIN BY REACTING 0.5-2 MOLS OF FORMALDEHYDE WITH 1 MOL OF A COMPOUND OF THE CLASS CONSISTING OF MONO-SUBSTITUTED PHENOL WHOSE SUBSTITUENT IN EACH CASE IS A MONOOLEFINIC HYDROCARBON RADICAL AND POLYMERS THEREOF, CHARACTERIZED (1) BY SAID RADICAL BEING IN THE PARA POSITION AND HAVING FROM THREE TO FOUR CARBON ATOMS AND (2) BY CASRRYING OUT THE REACTION IN THE PRESENCE OF, AS A CATALYST, A ZINC SALT OF AN ORGANIC ACID WHOSE STRENGTH IS NOT SUBSTANTIALLY GREATER THAN THAT OF FORMIC ACID, WHEREBY THERE IS OBTAINED AN OIL-SOLUBLE RESIN THAT PRODUCES VARNISH COATINGS OF GREATLY IMPROVED COLOR.
Claim 2
Independent Claim
103 words
A METHOD OF PREPARING A RESIN BY REACTING 0.5-2 MOLS OF FORMALDEHYDE WITH 1 MOL OF A COMPOUND OF THE CLASS CONSISTING OF MONO-SUBSTITUTED PHENOL WHOSE SUBSTITUENT IN EACH CASE IS A MONOOLEFINIC HYDROCARBON RADICAL AND POLYMERS THEREOF, CHARACTERIZED (1) BY SAID RADICAL BEING IN THE PARA POSITION AND HAVING FROM THREE TO FOUR CARBON ATOMS AND (2) BY CASRRYING OUT THE REACTION IN THE PRESENCE OF, AS A CATALYST, A ZINC SALT OF AN ORGANIC ACID WHOSE STRENGTH IS NOT SUBSTANTIALLY GREATER THAN THAT OF FORMIC ACID, WHEREBY THERE IS OBTAINED AN OIL-SOLUBLE RESIN THAT PRODUCES VARNISH COATINGS OF GREATLY IMPROVED COLOR.
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) | 1955-03-04 | 1955-09-03 | 1956-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-04 | 1959-09-03 | 1960-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-04 | 1963-09-03 | 1964-03-04 | $7700.00 | Window Closed / Lapsed |