US3223580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dimensionally stable mineral wool fiberboard
Assignee: Armstrong World Industries Inc
•
Filing: 1963-04-10
•
Granted: 1965-12-14
•
Expires: 1983-04-10
Abstract
No abstract record available.
Inventors
- 👤 Lewis W Eckert
- 👤 Celmer Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:11
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/20; D21H17/33; D21H17/34; D21H17/35; D21H11/00; D21H11/02; D21H11/04; D21H13/00; D21H13/36; D21H13/38; D21H13/40; D21H5/00; D21H5/12; D21H5/14; D21H5/141; D21H5/143
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
THE METHOD OF MAKING A STRONG, DIMENSIONALLY STABLE FIBERBOARD WHICH COMPRISES FORMING A SLURRY IN WATER OF KRAFT FIBERS, DEPOSITING A COATING OF SYNTHETIC RUBBER SELECTED FROM THE GROUP CONSISTING OF BUTADIENE HOMOPOLYMER, BUTADIENE-STYRENE COPOLYMERS, BUTADIENE-ACRYLONITRILE COPOLYMERS, POLYCHLOROPRENES, AND ISOPRENE RUBBERS ON THE KRAFT FIBERS, FORMING A SLURRY IN WATER OF UNCOATED MINERAL WOOL FIBERS AND SAID RUBBER-COATED KRAFT FIBERS, SAID MINERAL WOOL FIBERS BEING USED IN AN AMOUNT OF 60-95% BY WEIGHT OF TOTAL SOLIDS AND SAID KRAFT FIBERS BEING USED IN AN AMOUNT OF 2-20% BY WEIGHT OF TOTAL SOLIDE, MIXING THE SLURRY OF UNCOATED MINERAL WOOL FIBERS AND RUBBER-COATED KRAFT FIBERS, AND FORMING A BOARD HAVING A THICKNESS OF AT LEAST 1/4 INCH FROM THE MIXED SLURRY BY REMOVING THE WATER THEREFROM.
Claim 2
Independent Claim
125 words
THE METHOD OF MAKING A STRONG, DIMENSIONALLY STABLE FIBERBOARD WHICH COMPRISES FORMING A SLURRY IN WATER OF KRAFT FIBERS, DEPOSITING A COATING OF SYNTHETIC RUBBER SELECTED FROM THE GROUP CONSISTING OF BUTADIENE HOMOPOLYMER, BUTADIENE-STYRENE COPOLYMERS, BUTADIENE-ACRYLONITRILE COPOLYMERS, POLYCHLOROPRENES, AND ISOPRENE RUBBERS ON THE KRAFT FIBERS, FORMING A SLURRY IN WATER OF UNCOATED MINERAL WOOL FIBERS AND SAID RUBBER-COATED KRAFT FIBERS, SAID MINERAL WOOL FIBERS BEING USED IN AN AMOUNT OF 60-95% BY WEIGHT OF TOTAL SOLIDS AND SAID KRAFT FIBERS BEING USED IN AN AMOUNT OF 2-20% BY WEIGHT OF TOTAL SOLIDE, MIXING THE SLURRY OF UNCOATED MINERAL WOOL FIBERS AND RUBBER-COATED KRAFT FIBERS, AND FORMING A BOARD HAVING A THICKNESS OF AT LEAST 1/4 INCH FROM THE MIXED SLURRY BY REMOVING THE WATER THEREFROM.
References Cited (Backward Citations)
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US2773763A
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US3057772A
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US3036950A
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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) | 1968-12-13 | 1969-06-14 | 1969-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-13 | 1973-06-14 | 1973-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-13 | 1977-06-14 | 1977-12-14 | $7700.00 | Window Closed / Lapsed |