US2809178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil soluble phenol-formaldehyde resin
Assignee: Distillers Co Yeast Ltd
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Filing: 1954-03-15
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Granted: 1957-10-08
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Expires: 1974-03-15
Abstract
No abstract record available.
Inventors
- 👤 Turner John Harry Wallice
- 👤 Anthony Leonard Ralph
- 👤 Bramwyche Peter Lionel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:19
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/28; C08G8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PROCESS FOR THE PRODUCTION OF A THERMOPLASTIC OILSOLUBLE PHENOL-ALDEHYDE RESIN WHICH COMPRISES CONDENSING ONE MOLECULAR PROPORTION OF A MONONUCLEAR, MONOHYDRIC PHENOL WITH 0.6 TO 1.6. MOLECULAR PROPORTIONS OF A SATURATED ALIPHATIC ALDEHYDE HAVING NOT MORE THAN FOUR CARBON ATOMS IN THE MOLECULE IN THE PRESENCE OF AN ACID CATALYST TO PRODUCE A RESIN REACTION MIXTURE FREE FROM ALDEHYDE, DEHYDRATING THE RESIN REACTION MIXTURE AND HEATING THE DEHYDRATED RESIN RECTION MIXTURE TO A TEMPERATURE IN EXCESS OF 100*C, IN THE PRESENCE THEREIN OF A FRIEDEL CRAFTS HALIDE CATALYST AND AT LEAST 5% BY WEIGHT THEREOF OF A FREE MONONUCLEAR MONOHYDRIC PHENOL, THE LAST-NAMED MONOHYDRIC PHENOL BEING OTHER THAN C6H5OH WHEN THE FIRST-NAMED MONOHYDRIC PHENOL IS C6H5OH.
Claim 2
Dependent Claim
116 words
A PROCESS FOR THE PRODUCTION OF A THERMOPLASTIC OILSOLUBLE PHENOL-ALDEHYDE RESIN WHICH COMPRISES CONDENSING ONE MOLECULAR PROPORTION OF A MONONUCLEAR, MONOHYDRIC PHENOL WITH 0.6 TO 1.6. MOLECULAR PROPORTIONS OF A SATURATED ALIPHATIC ALDEHYDE HAVING NOT MORE THAN FOUR CARBON ATOMS IN THE MOLECULE IN THE PRESENCE OF AN ACID CATALYST TO PRODUCE A RESIN REACTION MIXTURE FREE FROM ALDEHYDE, DEHYDRATING THE RESIN REACTION MIXTURE AND HEATING THE DEHYDRATED RESIN RECTION MIXTURE TO A TEMPERATURE IN EXCESS OF 100*C, IN THE PRESENCE THEREIN OF A FRIEDEL CRAFTS HALIDE CATALYST AND AT LEAST 5% BY WEIGHT THEREOF OF A FREE MONONUCLEAR MONOHYDRIC PHENOL, THE LAST-NAMED MONOHYDRIC PHENOL BEING OTHER THAN C6H5OH WHEN THE FIRST-NAMED MONOHYDRIC PHENOL IS C6H5OH.
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) | 1960-10-07 | 1961-04-08 | 1961-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-07 | 1965-04-08 | 1965-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-07 | 1969-04-08 | 1969-10-08 | $7700.00 | Window Closed / Lapsed |