US2786759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making felted, fibrous sheet material
Assignee: Armstrong World Industries Inc
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Filing: 1954-12-10
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Granted: 1957-03-26
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Expires: 1974-12-10
Abstract
No abstract record available.
Inventors
- 👤 Jr David A Feigley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:14
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/21; D21H17/24; D21H17/31; D21H17/35
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A METHOD OF MAKING FELTED, FIBROUS SHEET-MAKING MATERAIL COMPRISING FORMING A SLURRY CONTAINING SHEETMAKING FIBERS, FORMING SEPARATELY AN AQUEOUS DISPERSION OF A SOLID, NONTACKY, SUBSTANTIALLY WATER-INSOLUBLE RESIN HAVING A DENSITY LESS THAN ABOUT 1.5 BY ADDING SAID RESIN AND LOCUST BEAN GUM TO WATER IN AN AMOUNT OF ABOUT 0.5 TO ABOUT 3 PARTS BY WEIGHT OF SAID GUM PER 100 PARTS BY WEIGHT OF SAID RESIN, ADDING SAID DISPERSION TO SAID SLURRY, AGITATING THE RESULTING SLURRY TO COAGULATE THE SOLIDS CONTENT OF SAID DISPERSION ONTO SAID FIBERS, AND FORMING THE SLURRY OF COATED FIBERS INTO A SHEET.
Claim 2
Independent Claim
98 words
A METHOD OF MAKING FELTED, FIBROUS SHEET-MAKING MATERAIL COMPRISING FORMING A SLURRY CONTAINING SHEETMAKING FIBERS, FORMING SEPARATELY AN AQUEOUS DISPERSION OF A SOLID, NONTACKY, SUBSTANTIALLY WATER-INSOLUBLE RESIN HAVING A DENSITY LESS THAN ABOUT 1.5 BY ADDING SAID RESIN AND LOCUST BEAN GUM TO WATER IN AN AMOUNT OF ABOUT 0.5 TO ABOUT 3 PARTS BY WEIGHT OF SAID GUM PER 100 PARTS BY WEIGHT OF SAID RESIN, ADDING SAID DISPERSION TO SAID SLURRY, AGITATING THE RESULTING SLURRY TO COAGULATE THE SOLIDS CONTENT OF SAID DISPERSION ONTO SAID FIBERS, AND FORMING THE SLURRY OF COATED FIBERS INTO A SHEET.
References Cited (Backward Citations)
US1675959A
Cited
US1902461A
Cited
US2215136A
Cited
US2375245A
Cited
US2601597A
Cited
US2550143A
Cited
US2558634A
Cited
US2685508A
Cited
US2613190A
Cited
US2698793A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-25 | 1960-09-24 | 1961-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-25 | 1964-09-24 | 1965-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-25 | 1968-09-24 | 1969-03-26 | $7700.00 | Window Closed / Lapsed |