Patent US2649422A successfully refreshed from Google Patents.
US2649422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phenolic ester resins
Assignee: General Mills Inc
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Filing: 1950-02-06
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Granted: 1953-08-18
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Expires: 1970-02-06
Abstract
No abstract record available.
Inventors
- 👤 Aelony David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:02
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/28; C08G8/04; C08G8/08; C08G8/10; C08G8/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A LIQUID, LOW ACID NUMBER ESTER OF AN OILINSOLUBLE PHENOL FORMALDEHYDE RESIN SUBSTANTAILLY FREE FROM METHYLOL GROUPS, SAID RESIN CONTAINING AN AVERAGE OF FROM ABOUT 4 TO ABOUT 10 PHENOLIC GROUPS PER MOLECULE AND BEING DERIVED FROM THE ACID CATALYZED CONDENSATION OF FROM 2 TO 21/2 MOLES OF FORMALDEHYDE PER 4 MOLES OF PHENOL AND BEING SUBSTANTIALLY FREE FROM PHENOL AND BISPHENOLS, THE HYDROXYL GROUPS OF THE RESIN BEING ESTERIFIED AT LEAST ABOUT 60% BY MEANS OF AN UNSATURATED HIGHER FATTY ACID HAVING AT LEAST SEMI-DRYING CHARACTERISTICS, SAID ESTER BEING SUBSTANTIALLY FREE FROM ACETYL GROUPS.
Claim 2
Dependent Claim
95 words
A LIQUID, LOW ACID NUMBER ESTER OF AN OILINSOLUBLE PHENOL FORMALDEHYDE RESIN SUBSTANTAILLY FREE FROM METHYLOL GROUPS, SAID RESIN CONTAINING AN AVERAGE OF FROM ABOUT 4 TO ABOUT 10 PHENOLIC GROUPS PER MOLECULE AND BEING DERIVED FROM THE ACID CATALYZED CONDENSATION OF FROM 2 TO 21/2 MOLES OF FORMALDEHYDE PER 4 MOLES OF PHENOL AND BEING SUBSTANTIALLY FREE FROM PHENOL AND BISPHENOLS, THE HYDROXYL GROUPS OF THE RESIN BEING ESTERIFIED AT LEAST ABOUT 60% BY MEANS OF AN UNSATURATED HIGHER FATTY ACID HAVING AT LEAST SEMI-DRYING CHARACTERISTICS, SAID ESTER BEING SUBSTANTIALLY FREE FROM ACETYL GROUPS.
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) | 1956-08-17 | 1957-02-16 | 1957-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-17 | 1961-02-16 | 1961-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-17 | 1965-02-16 | 1965-08-18 | $7700.00 | Window Closed / Lapsed |