US2659718A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of resin acid-fatty acid mixtures
Assignee: Leach Brothers Inc
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Filing: 1951-08-22
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Granted: 1953-11-17
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Expires: 1971-08-22
Abstract
No abstract record available.
Inventors
- 👤 Owen S Eckhardt
- 👤 Don F Cook
- 👤 Ismond E Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:59
CPC Classifications
C; C09; C09F; C09F1/00; C09F1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
IN A METHOD FOR INHIBITING THE CRYSTALLIZATION OF RESIN ACIDS IN MIXTURES OF RESIN ACIDS AND HIGHER MOLECULAR WEIGHT FATTY ACIDS DERIVED FROM TALL OIL, THE STEPS WHICH COMPRISE REACTING SAID MIXTURES WITH A LOWER MOLECULAR WEIGHT ALIPHATIC ALCOHOL TO ESTERIFY AT LEAST THE MAJOR PROPORTION OF THE FATTY ACIDS PRESENT IN SAID MIXTURES, AND THE HEATING SAID REACTION PRODUCT WITH FROM ABOUT 4% TO ABOUT 12%, BY WEIGHT, OF FORMALDEHYDE, BASED ON THE WEIGHT OF THE RESIN ACIDS.
Claim 2
Dependent Claim
79 words
IN A METHOD FOR INHIBITING THE CRYSTALLIZATION OF RESIN ACIDS IN MIXTURES OF RESIN ACIDS AND HIGHER MOLECULAR WEIGHT FATTY ACIDS DERIVED FROM TALL OIL, THE STEPS WHICH COMPRISE REACTING SAID MIXTURES WITH A LOWER MOLECULAR WEIGHT ALIPHATIC ALCOHOL TO ESTERIFY AT LEAST THE MAJOR PROPORTION OF THE FATTY ACIDS PRESENT IN SAID MIXTURES, AND THE HEATING SAID REACTION PRODUCT WITH FROM ABOUT 4% TO ABOUT 12%, BY WEIGHT, OF FORMALDEHYDE, BASED ON THE WEIGHT OF THE RESIN ACIDS.
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) | 1956-11-16 | 1957-05-18 | 1957-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-16 | 1961-05-18 | 1961-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-16 | 1965-05-18 | 1965-11-17 | $7700.00 | Window Closed / Lapsed |