Patent US2686141A successfully refreshed from Google Patents.
US2686141A
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Preparation of resin-bearing fibrous pulp
Assignee: Keyes Fibre Corp
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Filing: 1951-06-29
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Granted: 1954-08-10
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Expires: 1971-06-29
Abstract
No abstract record available.
Inventors
- 👤 Edith F Sawyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 21:18
CPC Classifications
B; B29; B29B; B29B11/00; B29B11/14; B29B11/16; D; D21; D21H; D21H23/00; D21H23/02; D21H23/22; D21H23/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A METHOD OF FORMING A RESIN-BEARING MOLDED PULP PREFORM, WHICH METHOD COMPRISES ELECTRICALLY CHARGING A MASS OF CELLULOSIC PULP, PREPARING A CLOUD OF FINELY-DIVIDED SOLID RESIN PARTICLES HAVING AN ELECTRICAL CHARGE OPPOSITE TO THAT OF THE PULP, BRINGING THE ELECTRICALLY CHARGED PULP AND RESIN PARTICLES TOGETHER TO CAUSE THEM TO BECOME ATTRACTED TO EACH OTHER AND CAUSE THE RESIN PARTICLES TO BECOME INTIMATELY BUT LOOSELY COMMINGLED WITH THE PULP, REMOVING A PORTION OF THE RESULTING LOOSE MASS AND COLD MOLDING THIS PORTION OF RESIN-BEARING PULP INTO THE DESIRED PREFORM SHAPE.
Claim 2
Independent Claim
90 words
A METHOD OF FORMING A RESIN-BEARING MOLDED PULP PREFORM, WHICH METHOD COMPRISES ELECTRICALLY CHARGING A MASS OF CELLULOSIC PULP, PREPARING A CLOUD OF FINELY-DIVIDED SOLID RESIN PARTICLES HAVING AN ELECTRICAL CHARGE OPPOSITE TO THAT OF THE PULP, BRINGING THE ELECTRICALLY CHARGED PULP AND RESIN PARTICLES TOGETHER TO CAUSE THEM TO BECOME ATTRACTED TO EACH OTHER AND CAUSE THE RESIN PARTICLES TO BECOME INTIMATELY BUT LOOSELY COMMINGLED WITH THE PULP, REMOVING A PORTION OF THE RESULTING LOOSE MASS AND COLD MOLDING THIS PORTION OF RESIN-BEARING PULP INTO THE DESIRED PREFORM SHAPE.
References Cited (Backward Citations)
US2173032A
Cited
US2174328A
Cited
US2270341A
Cited
US2336745A
Cited
US2569169A
Cited
US2411660A
Cited
US2564397A
Cited
US2466906A
Cited
US2493194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-09 | 1958-02-08 | 1958-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-09 | 1962-02-08 | 1962-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-09 | 1966-02-08 | 1966-08-10 | $7700.00 | Window Closed / Lapsed |