Patent JPH0457860A successfully refreshed from Google Patents.
US3057772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic fiber paper and method of making same
Assignee: Riegel Paper Corp
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Filing: 1957-04-23
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Granted: 1962-10-09
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Expires: 1977-04-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Donald G Magill
- 👤 James C Eaton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:57
CPC Classifications
D; D21; D21H; D21H13/00; D21H13/36; D21H13/38; D21H13/40; D21H13/10; D21H13/20; D21H13/26; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/35; D21H17/37; D21H17/63; D21H17/66; D21H23/00; D21H23/02; D21H23/04; D21H23/06; D21H23/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
THE PROCESS OF PREPARING STOCK FOR THE MANUFACTURE OF PAPER COMPOSED PRIMARILY OF SYNTHETIC MATERIAL, WHICH COMPRISES FORMING A SLURRY OF HIGHLYBEATAEN NATURAL FIBERS, ADDING TO THE THUS FORMED SLURRY AN EMULSIFIED LONG-CHAIN POLYMER BINDER, RECIPITATING THE BINDER ONTO THE NATURAL FIBERS BY INTRODUCING INTO THE MIXTURE OF SLURRY AND BINDER FROM 2 PERCENT TO 10 PERCENT OF ALUM, ACCOMPANIED BY STEADY AGITATION OF THE MIXTURE, TO REDUCE THE PH OF THE SLURRY TO SUBSTANTIALLY WITHIN THE RANGE OF 3.5 TO 6.0, AND THEREAFTER MIXING THE NATURAL FIBERS AND PRECIPITATED BINDER TOGETHER WITH HYDROPHOBIC SYNTHETIC FIBERS IN AN AQUEOUS SOLUTION IN THE PROPORTION OF LESS THAN 5 PERCENT NATURAL FIBERS AND MORE THAN 95 PERCENT SYNTHETIC FIBERS.
Claim 2
Dependent Claim
117 words
THE PROCESS OF PREPARING STOCK FOR THE MANUFACTURE OF PAPER COMPOSED PRIMARILY OF SYNTHETIC MATERIAL, WHICH COMPRISES FORMING A SLURRY OF HIGHLYBEATAEN NATURAL FIBERS, ADDING TO THE THUS FORMED SLURRY AN EMULSIFIED LONG-CHAIN POLYMER BINDER, RECIPITATING THE BINDER ONTO THE NATURAL FIBERS BY INTRODUCING INTO THE MIXTURE OF SLURRY AND BINDER FROM 2 PERCENT TO 10 PERCENT OF ALUM, ACCOMPANIED BY STEADY AGITATION OF THE MIXTURE, TO REDUCE THE PH OF THE SLURRY TO SUBSTANTIALLY WITHIN THE RANGE OF 3.5 TO 6.0, AND THEREAFTER MIXING THE NATURAL FIBERS AND PRECIPITATED BINDER TOGETHER WITH HYDROPHOBIC SYNTHETIC FIBERS IN AN AQUEOUS SOLUTION IN THE PROPORTION OF LESS THAN 5 PERCENT NATURAL FIBERS AND MORE THAN 95 PERCENT SYNTHETIC FIBERS.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |