US2895868A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making resin impregnated paper
Assignee: Riegel Paper Corp
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Filing: 1955-01-26
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Granted: 1959-07-21
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Expires: 1975-01-26
Abstract
No abstract record available.
Inventors
- 👤 Jr Donald G Magill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:32
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/46; D21H17/47; D21H17/48; D21H17/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A METHOD OF MAKING A RESIN IMPREGNATED PAPER WHICH COMPRISES PREPARING AN AQUEOUS SLURRY OF PULP, ADDING A QUANTITY OF A BEATER ADDITION RESIN AND A PRECIPITATING AGENT TO THE AQUEOUS SLURRY PRIOR TO SUPPLYING THE AQUEOUS SLURRY TO THE HEAD BOX OF A PAPER MAKING MACHINE, INITIALLY MAINTAINING THE RESIN-PULP-PRECIPITATING AGENT SLURRY AT A TEMPERATURE NOT ABOVE THE STICKING POINT STEMPERATURE OF THE RESIN WHEREBY TO EFFECT A PARTIAL PRERAISING THE TEMPERATURE OF THE AQUEOUS RESIN-PULP-PRECIPITATING AGENT SLURRY PRIOR TO ITS REACHING THE HEAD BOX TO A TEMPERATURE ABOVE THE STICKING POINT TEMPERATURE OF THE RESIN WHEREBY TO EFFECT A FURTHER PRECIPITATION OF THE RESIN ONTO THE FIBERS, COOLING SAID AQUEOUS SLURRY TO REDUCE THE TEMPERATURE OF THE RESIN, AND THEN MAKING PAPER FROM SAID COOLED SLURRY.
Claim 2
Independent Claim
128 words
A METHOD OF MAKING A RESIN IMPREGNATED PAPER WHICH COMPRISES PREPARING AN AQUEOUS SLURRY OF PULP, ADDING A QUANTITY OF A BEATER ADDITION RESIN AND A PRECIPITATING AGENT TO THE AQUEOUS SLURRY PRIOR TO SUPPLYING THE AQUEOUS SLURRY TO THE HEAD BOX OF A PAPER MAKING MACHINE, INITIALLY MAINTAINING THE RESIN-PULP-PRECIPITATING AGENT SLURRY AT A TEMPERATURE NOT ABOVE THE STICKING POINT STEMPERATURE OF THE RESIN WHEREBY TO EFFECT A PARTIAL PRERAISING THE TEMPERATURE OF THE AQUEOUS RESIN-PULP-PRECIPITATING AGENT SLURRY PRIOR TO ITS REACHING THE HEAD BOX TO A TEMPERATURE ABOVE THE STICKING POINT TEMPERATURE OF THE RESIN WHEREBY TO EFFECT A FURTHER PRECIPITATION OF THE RESIN ONTO THE FIBERS, COOLING SAID AQUEOUS SLURRY TO REDUCE THE TEMPERATURE OF THE RESIN, AND THEN MAKING PAPER FROM SAID COOLED SLURRY.
References Cited (Backward Citations)
US1949249A
Cited
US1825869A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |