Patent US3227667A successfully refreshed from Google Patents.
US3227667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lignin, phenol, and aldehyde condensation process and product
Assignee: Hexion Inc
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Filing: 1960-09-21
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Granted: 1966-01-04
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Expires: 1980-09-21
Abstract
No abstract record available.
Inventors
- 👤 William R Moffitt
- 👤 Morris B Berkey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:13
CPC Classifications
C; C08; C08H; C08H6/00; C08G; C08G8/00; C08G8/28; C08G8/38
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
173 words
IN MAKING A LIGNIN, PHENOL AND ALDEHYDE CONDENSATION PRODUCT, THE PROCESS WHICH COMPRISES FORMING A MIXTURE OF ABOUT 100 PARTS BY WEIGHT OF LIGNIN, 40-150 PARTS OF A PHENOL SELECTED FROM THE GROUP CONSISTING OF PHENOL AND CRESOL, WATER, AND AN ACID AS A CATALYST IN AMOUNT TO ESTABLISH THE PH OF THE MIXTURE AT ABOUT 0.1-5, HEATING THE MIXTURE UNTIL THE LIGNIN FORMS A WATER SOLUBLE COMPOUND WITH THE PHENOL, THEN INTRODUCING AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND FURFURAL, IN PROPORTION CORRESPONDING TO ABOUT 1.5-2.5 MOLES OF THE ALDEHYDE FOR EACH MOLE OF THE PHENOL USED AND AN ADDITIONAL AMOUNT OF THE ALDEHYDE EQUAL TO ABOUT 25-45 PARTS BY WEIGHT FOR EACH 100 PARTS OF THE LIGNIN, AND AN ALKALI METAL ALKALI IN AMOUNT TO NEUTRALIZE THE SAID ACID AND RAISE THE PH OF THE RESULTING MIXTURE TO APPROXIMATELY 10-14, AND HEATING THE RESULTING ALKALIZED MIXTURE UNTIL A FINAL CONDENSATE RESULTS THAT IS SOLUBLE IN THE SAID ALKALIZED MIXTURE BUT INSOLUBLE IN WATER AT A PH OF 7.
Claim 2
Dependent Claim
173 words
IN MAKING A LIGNIN, PHENOL AND ALDEHYDE CONDENSATION PRODUCT, THE PROCESS WHICH COMPRISES FORMING A MIXTURE OF ABOUT 100 PARTS BY WEIGHT OF LIGNIN, 40-150 PARTS OF A PHENOL SELECTED FROM THE GROUP CONSISTING OF PHENOL AND CRESOL, WATER, AND AN ACID AS A CATALYST IN AMOUNT TO ESTABLISH THE PH OF THE MIXTURE AT ABOUT 0.1-5, HEATING THE MIXTURE UNTIL THE LIGNIN FORMS A WATER SOLUBLE COMPOUND WITH THE PHENOL, THEN INTRODUCING AN ALDEHYDE SELECTED FROM THE GROUP CONSISTING OF FORMALDEHYDE AND FURFURAL, IN PROPORTION CORRESPONDING TO ABOUT 1.5-2.5 MOLES OF THE ALDEHYDE FOR EACH MOLE OF THE PHENOL USED AND AN ADDITIONAL AMOUNT OF THE ALDEHYDE EQUAL TO ABOUT 25-45 PARTS BY WEIGHT FOR EACH 100 PARTS OF THE LIGNIN, AND AN ALKALI METAL ALKALI IN AMOUNT TO NEUTRALIZE THE SAID ACID AND RAISE THE PH OF THE RESULTING MIXTURE TO APPROXIMATELY 10-14, AND HEATING THE RESULTING ALKALIZED MIXTURE UNTIL A FINAL CONDENSATE RESULTS THAT IS SOLUBLE IN THE SAID ALKALIZED MIXTURE BUT INSOLUBLE IN WATER AT A PH OF 7.
Claim 3
Dependent Claim
69 words
AN ADHESIVE SOLUTION COMPRISING THE ALKALI CATALYZED, ALKALI SOLUBLE, AND WATER INSOLUBLE CONDENSATION PRODUCT OF ABOUT 35-70 PARTS OF FORMALDEHYDE ON THE ANHYDROUS BASIS WITH THE ACID CATALYZED CONDENSATION PRODUCT OF ABOUT 100 PARTS OF LIGNIN AND 40-150 PARTS OF PHENOL, WATER, AND AN ALKALI METAL ALKALI IN AMOUNT TO CAUSE SOLUTION OF SAID WATER INSOLUBLE CONDENSATION PRODUCT, SAID SOLUTION BEING THE PRODUCT OF THE PROCESS OF CLAIM 1.
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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |