Patent US2772157A successfully refreshed from Google Patents.
US2772157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of mixed fibrous sheet material
Assignee: Raybestos Manhattan Inc
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Filing: 1953-03-16
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Granted: 1956-11-27
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Expires: 1973-03-16
Abstract
No abstract record available.
Inventors
- 👤 Osborn H Cilley
- 👤 Robert L Moore
- 👤 Izador J Novak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:16
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/06; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T428/31504; Y10T428/31551; Y10T428/31623; Y10T428/31627; Y10T428/31652
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
45 words
A SMOOTH WATER-LAID FELTED FIBROUS SHEET COMPRISING OF THE DRIED RESIDUE OF AN ALKALINE COLLOIDAL DISPERSION OF CHRYSOTILE ASBESTOS FIBERS, SAID SHEET INCLUDING INDIVIDUALIZED CUT GLASS YARN FIBERS SUBSTANTIALLY UNIFORMLY DISTRIBUTED THERETHROUGH, THE GLASS FIBERS CARRYING A WETTABLE, WATER-INSOLUBLE, STRONGLY ADHERENT HARDENED ORGANIC FILM COATING.
Claim 2
Dependent Claim
45 words
A SMOOTH WATER-LAID FELTED FIBROUS SHEET COMPRISING OF THE DRIED RESIDUE OF AN ALKALINE COLLOIDAL DISPERSION OF CHRYSOTILE ASBESTOS FIBERS, SAID SHEET INCLUDING INDIVIDUALIZED CUT GLASS YARN FIBERS SUBSTANTIALLY UNIFORMLY DISTRIBUTED THERETHROUGH, THE GLASS FIBERS CARRYING A WETTABLE, WATER-INSOLUBLE, STRONGLY ADHERENT HARDENED ORGANIC FILM COATING.
Claim 3
Independent Claim
140 words
THE METHOD OF FORMING A SMOOTH STRONG SHEET COMPOSED OF A SUBSTANTIALLY HOMOGENEOUS MIXTURE OF ASBESTOS FIBERS AND FROM ABOUT 1% TO ABOUT 75% OF GLASS FIBERS BY WEIGHT OF THE COMPOSITE, WHICH COMPRISES MIXING GLASS FILAMENTS OF LESS THAN ABOUT 10 MICRONS IN DIAMETER AND FROM ABOUT 1/8 TO ABOUT 1 INCH IN LENGTH DERIVED FROM CUT GLASS YARN AND CARRYING A WETTABLE, WATER-INSOLUBLE, STRONG ADHERENT HARDENING ORGANIC FILM COATING, WHILE AN AQUEOUS ALKALINE COLLOIDAL DISPERSION OF CHRYSOTILE ASBESTOS FIBERS CONTAINING ORGANIC CHRYSOTILE ASBESTOS COLLOIDIZING AGENT TO FORM A SLURRY HAVING A VISCOSITY OF FROM ABOUT TWICE TO ABOUT EIGHT TIMES THAT OF WATER TO THEREBY STABLY SUSPEND SAID GLASS FILAMENTS THEREIN AND TO UNIFORMLY DISTRIBUTE THE FIBERS WITH EACH OTHER IN AN INDIVIDUALIZED MANNER, AND THEN FELTING SAID FIBERS ON A FORAMINOUS CARRIER OF A PAPER MAKING MACHINE.
Claim 4
Independent Claim
140 words
THE METHOD OF FORMING A SMOOTH STRONG SHEET COMPOSED OF A SUBSTANTIALLY HOMOGENEOUS MIXTURE OF ASBESTOS FIBERS AND FROM ABOUT 1% TO ABOUT 75% OF GLASS FIBERS BY WEIGHT OF THE COMPOSITE, WHICH COMPRISES MIXING GLASS FILAMENTS OF LESS THAN ABOUT 10 MICRONS IN DIAMETER AND FROM ABOUT 1/8 TO ABOUT 1 INCH IN LENGTH DERIVED FROM CUT GLASS YARN AND CARRYING A WETTABLE, WATER-INSOLUBLE, STRONG ADHERENT HARDENING ORGANIC FILM COATING, WHILE AN AQUEOUS ALKALINE COLLOIDAL DISPERSION OF CHRYSOTILE ASBESTOS FIBERS CONTAINING ORGANIC CHRYSOTILE ASBESTOS COLLOIDIZING AGENT TO FORM A SLURRY HAVING A VISCOSITY OF FROM ABOUT TWICE TO ABOUT EIGHT TIMES THAT OF WATER TO THEREBY STABLY SUSPEND SAID GLASS FILAMENTS THEREIN AND TO UNIFORMLY DISTRIBUTE THE FIBERS WITH EACH OTHER IN AN INDIVIDUALIZED MANNER, AND THEN FELTING SAID FIBERS ON A FORAMINOUS CARRIER OF A PAPER MAKING MACHINE.
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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) | 1959-11-27 | 1960-05-28 | 1960-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-27 | 1964-05-28 | 1964-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-27 | 1968-05-28 | 1968-11-27 | $7700.00 | Window Closed / Lapsed |