Patent US2889241A successfully refreshed from Google Patents.
US2889241A
Expired / Lapsed
US
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Phenolic resin composition and means for controlling viscosity of same
Assignee: Reichhold Chemicals Inc
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Filing: 1954-12-13
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Granted: 1959-06-02
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Expires: 1974-12-13
Abstract
No abstract record available.
Inventors
- 👤 Thomas A Gregory
- 👤 Frederic J Shelton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:47
CPC Classifications
C; C09; C09J; C09J161/00; C09J161/04; C09J161/06; C08; C08L; C08L2666/00; C08L2666/54; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31942; Y10T428/31949; Y10T428/31964; Y10T428/31967
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
124 words
AN ADHESIVE COMPOSITION COMPRISING AN AQUEOUS ALKALINE THERMOSETTING PHENOL FORMALDEHYDE RESIN SOLUTION CONTAINING .2-1 MOL OF AN ALKALINE CONDENSATION CATALYST PER MOL OF PHENOL, HAVING ITS VISCOSITY INCREASED BY THE ADDITION TO THE ALREADY FORMED RESIN OF A THICKENING AGENT COMPRISING BORON-OXYGEN COMPOUND SELECTED FROM THE GROUP CONSISTING OF BORIC ACID AND ITS ALKALI METAL AND AMMONIUM SALTS, IN PROPORTION OF .1-10% BY WEIGHT BASED ON THE WEIGHT OF THE RESIN SOLIDS, THE INITIAL PHENOL FORMALDEHYDE RESIN HAVING BEEN HEAT REACTED TO A VISCOSITY SUBSTANTIALLY WITHIN THE RANGE OF 50-3400 CPS. AT 25*C. PRIOR TO THE ADDITION OF THE THICKENING AGENT, AND THE QUANTITY OF THICKENING AGENT BEING IN INVERSE PROPORTION TO THE VISCOSITY AND INSUFFICIENT TO COMPLETELY NEUTRALIZE THE ALKALINITY OF THE COMPOSITION.
Claim 2
Dependent Claim
124 words
AN ADHESIVE COMPOSITION COMPRISING AN AQUEOUS ALKALINE THERMOSETTING PHENOL FORMALDEHYDE RESIN SOLUTION CONTAINING .2-1 MOL OF AN ALKALINE CONDENSATION CATALYST PER MOL OF PHENOL, HAVING ITS VISCOSITY INCREASED BY THE ADDITION TO THE ALREADY FORMED RESIN OF A THICKENING AGENT COMPRISING BORON-OXYGEN COMPOUND SELECTED FROM THE GROUP CONSISTING OF BORIC ACID AND ITS ALKALI METAL AND AMMONIUM SALTS, IN PROPORTION OF .1-10% BY WEIGHT BASED ON THE WEIGHT OF THE RESIN SOLIDS, THE INITIAL PHENOL FORMALDEHYDE RESIN HAVING BEEN HEAT REACTED TO A VISCOSITY SUBSTANTIALLY WITHIN THE RANGE OF 50-3400 CPS. AT 25*C. PRIOR TO THE ADDITION OF THE THICKENING AGENT, AND THE QUANTITY OF THICKENING AGENT BEING IN INVERSE PROPORTION TO THE VISCOSITY AND INSUFFICIENT TO COMPLETELY NEUTRALIZE THE ALKALINITY OF THE COMPOSITION.
Claim 3
Dependent Claim
37 words
A PROCESS FOR THE MANUFACTURE OF LAMINATED PRODUCTS WHICH COMPRISES APPLYING THE RESIN OF CLAIM 1 TO FIBROUS LAYERS, ASSEMBLING THE TREATED LAYERS IN SUPERPOSED POSITION, AND HOT PRESSING THE ASSEMBLY TO EFFECT CONSOLIDATION OF THE LAYERS.
References Cited (Backward Citations)
US2235193A
Cited
US2338430A
Cited
US2437710A
Cited
US2414415A
Cited
US2413624A
Cited
US2462253A
Cited
US2631098A
Cited
US2621165A
Cited
US2667466A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-06-01 | 1962-12-01 | 1963-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-06-01 | 1966-12-01 | 1967-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-06-01 | 1970-12-01 | 1971-06-02 | $7700.00 | Window Closed / Lapsed |