Patent US2546946A successfully refreshed from Google Patents.
US2546946A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified phenol-formaldehyde resins
Assignee: ExxonMobil Oil Corp
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Filing: 1947-09-04
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Granted: 1951-03-27
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Expires: 1967-09-04
Abstract
No abstract record available.
Inventors
- 👤 Howard D Hartough
- 👤 John W Schick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:36
CPC Classifications
C; C08; C08G; C08G8/00; C08G8/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A THERMOSETTING PHENOLIC RESIN CONTAINING NITROGEN IN THE PROPORTION OF ONE ATOM OF NITROGEN TO AT LEAST THREE PHENOL RADICALS AND CONTAINING AT LEAST THREE PER CENT BY WEIGHT OF NITROGEN, SAID RESIN HAVING BEEN OBTAINED BY CONDENSING A PHENOL DEVOID OF REACTIVE ACID AND BASIC SUBSTITUENTS AND HAVING AT LEAST ONE ACTIVE NUCLEAR HYDROGEN WITH FORMALDEHYDE IN THE MOLAL RATIO OF 1:2 TO 4 IN THE PRESENCE OF AT LEAST 0.25 MOLE OF AN AMMONIUM HALIDE SELECTED FROM THE GROUP CONSISTING OF AMMONIUM CHLORIDE, AMMONIUM BROMIDE AND AMMONIUM IODIDE AND IN THE PRESENCE OF AT LEAST 0.5 MOLE OF A MODIFIER SELECTED FROM THE GROUP CONSISTING OF FREE ACIDS HAVING AN IONIZATION CONSTANT ABOVE 1X10-5 BUT NOT GREATER THAN 1.7X10-2 AND ALKALI METAL ACID SULFITES.
Claim 2
Dependent Claim
126 words
A THERMOSETTING PHENOLIC RESIN CONTAINING NITROGEN IN THE PROPORTION OF ONE ATOM OF NITROGEN TO AT LEAST THREE PHENOL RADICALS AND CONTAINING AT LEAST THREE PER CENT BY WEIGHT OF NITROGEN, SAID RESIN HAVING BEEN OBTAINED BY CONDENSING A PHENOL DEVOID OF REACTIVE ACID AND BASIC SUBSTITUENTS AND HAVING AT LEAST ONE ACTIVE NUCLEAR HYDROGEN WITH FORMALDEHYDE IN THE MOLAL RATIO OF 1:2 TO 4 IN THE PRESENCE OF AT LEAST 0.25 MOLE OF AN AMMONIUM HALIDE SELECTED FROM THE GROUP CONSISTING OF AMMONIUM CHLORIDE, AMMONIUM BROMIDE AND AMMONIUM IODIDE AND IN THE PRESENCE OF AT LEAST 0.5 MOLE OF A MODIFIER SELECTED FROM THE GROUP CONSISTING OF FREE ACIDS HAVING AN IONIZATION CONSTANT ABOVE 1X10-5 BUT NOT GREATER THAN 1.7X10-2 AND ALKALI METAL ACID SULFITES.
References Cited (Backward Citations)
US1955731A
Cited
DE686988C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-03-26 | 1954-09-25 | 1955-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-03-26 | 1958-09-25 | 1959-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-03-26 | 1962-09-25 | 1963-03-27 | $7700.00 | Window Closed / Lapsed |