US3095392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble sulfited lignin-phenolicformaldehyde complex
Assignee: Rayonier Inc
•
Filing: 1959-04-15
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Granted: 1963-06-25
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Expires: 1979-04-15
Abstract
No abstract record available.
Inventors
- 👤 Franklin W Herrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:38
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
62 words
THE PROCESS OF FORMING A POLYMERIC LIGNIN-PHENOLIC COMPLEX WHICH COMPRISES PARTIALLY CONDENSING A CONCENTRATED SULFITED LIGN IN AQUEOUS SOLUTION WITH ALKALINE POLYMETHYLOLPHENOL HAVING A FORMALDHYDE-TO-PHENOL MOLE RATIO OF FROM 2.0 TO 3.0 AND CONTROLLING THE REACTION BY MEANS OF THE TEMPERATURE AND TIME OF TREATMENT TO PREVENT THE VISCOSITY OF THE COMPLEX FROM RISING SO HIGH AS TO FORM A WATER-SOLUBLE COMPLEX.
Claim 2
Dependent Claim
62 words
THE PROCESS OF FORMING A POLYMERIC LIGNIN-PHENOLIC COMPLEX WHICH COMPRISES PARTIALLY CONDENSING A CONCENTRATED SULFITED LIGN IN AQUEOUS SOLUTION WITH ALKALINE POLYMETHYLOLPHENOL HAVING A FORMALDHYDE-TO-PHENOL MOLE RATIO OF FROM 2.0 TO 3.0 AND CONTROLLING THE REACTION BY MEANS OF THE TEMPERATURE AND TIME OF TREATMENT TO PREVENT THE VISCOSITY OF THE COMPLEX FROM RISING SO HIGH AS TO FORM A WATER-SOLUBLE COMPLEX.
References Cited (Backward Citations)
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US2649414A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-24 | 1966-12-24 | 1967-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-24 | 1970-12-24 | 1971-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-24 | 1974-12-24 | 1975-06-25 | $7700.00 | Window Closed / Lapsed |