Patent US3223698A successfully refreshed from Google Patents.
US3223698A
Expired / Lapsed
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Method for liquefying lignin
Assignee: Noguchi Institute
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Filing: 1961-05-29
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Granted: 1965-12-14
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Expires: 1981-05-29
Abstract
No abstract record available.
Inventors
- 👤 Oshima Motoyoshi
- 👤 Maeda Yoshio
- 👤 Kashima Kan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:28
CPC Classifications
C; C08; C08H; C08H6/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
32 words
5-1:11-12); KEEPING THE MIXTURE AT THE REACTION CONDITION OF 300* TO 400*C. AND 150 TO 450 ATM. UNDER HYDRGEN GAS ATMOSPHERE UNTIL THE LIGNIN IS LIQUEFIED; AND SEPARATING THE RESULTING LIQUEFIED PRODUCT.
Claim 2
Independent Claim
69 words
A METHOD FOR LIQUEFYING LIGNIN, COMPRISING ADMIXING LIGNIN, AS THE RAW MATERIAL, WITH 50% TO 200%, BASED UPON THE LIGNIN MATERIAL, OF A SOLVENT THEREFOR; ADDING THERETO 0.5 TO 30% OF AT LEAST ONE CATALYST SELECTED FROM THE GROUP CONSISTING OF MIXTURES OF IRON OXIDE, TIN OXIDE,COPPER OXIDE AND SULFUR; IRON HYDROXIDE, TIN HYDROXIDE, COPPER HYDROXIDE AND SULFUR; IRON, TIN, COPPER AND SULFUR, (MOLE RATO OF FE:CU:SN:S BEING 10:0.5-1:
References Cited (Backward Citations)
US2246481A
Cited
US2390063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |