Patent US2501665A successfully refreshed from Google Patents.
US2501665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lignin resins and process of making same
Assignee: Masonite Corp
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Filing: 1946-05-24
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Granted: 1950-03-28
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Expires: 1966-05-24
Abstract
No abstract record available.
Inventors
- 👤 Evans Raymond Norris
- 👤 Ingrassia Angelo Paul
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:47
CPC Classifications
C; C08; C08H; C08H6/00; C08G; C08G12/00; C08G12/02; C08G12/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
PROCESS OF PREPARING A THERMO-SETTING RESIN HAVING WATER AND ALKALI RESISTANT PROPERTIES WHICH COMPRISES DISSOLVING ALKALI SOLUBLE LIGNIN IN AN ETHER COMPOUND CONTAINING ONLY C, H AND O, ADING AN AMINO-TRIAZINE COMPOUND HAVING AT LEAST ONE HYDROGEN ATTACHED TO THE NON-RING AMINO NITROGEN AND FORMALDEHYDE TO THE LIGNIN SOLUTION, AND SUBJECTING THE SOLUTION TO HEAT TO OBTAIN A REACTION BETWEEN THE LIGNIN, THE AMINOTRIAZINE COMPOUND AND FORMALDEHYDE.
Claim 2
Dependent Claim
67 words
PROCESS OF PREPARING A THERMO-SETTING RESIN HAVING WATER AND ALKALI RESISTANT PROPERTIES WHICH COMPRISES DISSOLVING ALKALI SOLUBLE LIGNIN IN AN ETHER COMPOUND CONTAINING ONLY C, H AND O, ADING AN AMINO-TRIAZINE COMPOUND HAVING AT LEAST ONE HYDROGEN ATTACHED TO THE NON-RING AMINO NITROGEN AND FORMALDEHYDE TO THE LIGNIN SOLUTION, AND SUBJECTING THE SOLUTION TO HEAT TO OBTAIN A REACTION BETWEEN THE LIGNIN, THE AMINOTRIAZINE COMPOUND AND FORMALDEHYDE.
References Cited (Backward Citations)
GB282635A
Cited
US1922690A
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US2068926A
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US2197357A
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US2320817A
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US2368451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-03-27 | 1953-09-26 | 1954-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-03-27 | 1957-09-26 | 1958-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-03-27 | 1961-09-26 | 1962-03-28 | $7700.00 | Window Closed / Lapsed |