US2769713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making asbestos paper containing a tacky bonding agent
Assignee: Wyeth Holdings LLC
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Filing: 1953-03-27
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Granted: 1956-11-06
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Expires: 1973-03-27
Abstract
No abstract record available.
Inventors
- 👤 Lucius H Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:34
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/35
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A METHOD OF MANUFACTURING ABESTOS PAPER OF IMPROVED STRENGTH PLIABILITY AND ELASTICITY FROM ALKALINEREACTING ASBESTOS FIBERS IN AQUEOUS SUSPENSION AND AN ANIONIC NORMALLY ALUM-UNSTABLE LATEX OF A NORMALLY TACKY BONDING AGENT FOR SAID FIBERS WITHOUT CAUSING SAID FIBERS TO CLOT, WHICH COMPRISES FORMING A STOCK OF PAPERMAKING ASBESTOS FIBERS, ADDING TO AN AQUEOUS ANIONIC ALUMUNSTABLE LATEX OF A TACKY ORGANIC HYDROPHOBIC BONDING AGENT SUFFICIENT OF A NONIONIC DISPERSING AGENT AND SUFFICIENT OF AN ANIONIC DISPERSING AGENT SELECTED FROM THE GROUP CONSISTING OF THE ALUM-STABLE SULFATE AND ALUMSTABLE SULFONATE DISPERSING AGENTS TO RENDER SAID LATEX ALUM-STABLE, THE WEIGHT OF SAID ADDED ALUM-STABLE ANIONIC DISPERSING AGENT BEING BETWEEN 25% AND 100% OF THE WEIGHT OF SAID ADDED NONIONIC DISPERSING AGENT, ADDING SAID THUS STABILIZED LATEX TO SAID SUSPENSION OF ASBESTOS FIBERS, THE WEIGHT OF BONDING AGENT IN SAID LATEX BEING BETWEEN ABOUT 5% AND 50% OF THE DRY WEIGHT OF THE FIBERS, THEREBY FLOCCULATING AND IRREVERSIBLY PRECIPITATE AT LEAST A MAJOR PROPORTION OF SAID BONDING AGENT ON SAID FIBERS; FORMING SAID FIBERS INTO PAPER, AND DRYING SAID PAPER.
Claim 2
Independent Claim
176 words
A METHOD OF MANUFACTURING ABESTOS PAPER OF IMPROVED STRENGTH PLIABILITY AND ELASTICITY FROM ALKALINEREACTING ASBESTOS FIBERS IN AQUEOUS SUSPENSION AND AN ANIONIC NORMALLY ALUM-UNSTABLE LATEX OF A NORMALLY TACKY BONDING AGENT FOR SAID FIBERS WITHOUT CAUSING SAID FIBERS TO CLOT, WHICH COMPRISES FORMING A STOCK OF PAPERMAKING ASBESTOS FIBERS, ADDING TO AN AQUEOUS ANIONIC ALUMUNSTABLE LATEX OF A TACKY ORGANIC HYDROPHOBIC BONDING AGENT SUFFICIENT OF A NONIONIC DISPERSING AGENT AND SUFFICIENT OF AN ANIONIC DISPERSING AGENT SELECTED FROM THE GROUP CONSISTING OF THE ALUM-STABLE SULFATE AND ALUMSTABLE SULFONATE DISPERSING AGENTS TO RENDER SAID LATEX ALUM-STABLE, THE WEIGHT OF SAID ADDED ALUM-STABLE ANIONIC DISPERSING AGENT BEING BETWEEN 25% AND 100% OF THE WEIGHT OF SAID ADDED NONIONIC DISPERSING AGENT, ADDING SAID THUS STABILIZED LATEX TO SAID SUSPENSION OF ASBESTOS FIBERS, THE WEIGHT OF BONDING AGENT IN SAID LATEX BEING BETWEEN ABOUT 5% AND 50% OF THE DRY WEIGHT OF THE FIBERS, THEREBY FLOCCULATING AND IRREVERSIBLY PRECIPITATE AT LEAST A MAJOR PROPORTION OF SAID BONDING AGENT ON SAID FIBERS; FORMING SAID FIBERS INTO PAPER, AND DRYING SAID PAPER.
References Cited (Backward Citations)
US1799217A
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US1907634A
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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) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |