US3311516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible compositions with rigid setting properties
Assignee: Johns Manville Corp
•
Filing: 1964-01-02
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Granted: 1967-03-28
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Expires: 1984-01-02
Abstract
No abstract record available.
Inventors
- 👤 Karlis L Jaunarajs
- 👤 Frederick L Pundsack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:31
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/14; C04B28/141; C04B2111/00; C04B2111/00474; C04B2111/00482; C04B2111/20; C04B2111/28; C04B2111/30; C04B2111/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
THE METHOD OF APPLYING A COHERENT, HYDRATION SETTING GYPSUM SHEET COMPRISING FORMING A DILUTE AQUEOUS SLURRY WITH APPROXIMATELY 20 TO 40 PARTS BY WEIGHT OF ASBESTOS FIBER AND APPROXIMATELY 60 TO 80 PARTS BY WEIGHT OF PARTICULATE GYPSUM SUBSTANTIALLY ALL SIZED LESS THAN ABOUT 250 MICRONS IN DIAMETER, CONSOLIDATING THE SOLIDS OF THE SLURRY INTO A COHERENT SHEET BY FILTERING, DRYING THE CONSOLIDATED SHEET AT TEMPERATURES WITHIN THE APPROXIMATE RANGE OF 300 TO 375*F. FOR A PERIOD OF ABOUT 1/2 TO 6 HOURS TO DEHYDRATE THE GYPSUM, REMOVING AT LEAST ABOUT 50% BY WEIGHT THEREOF OF ITS COMBINED WATER OF CRYSTALLIZATION, APPLYING AND CONFORMING THE RESULTING PLIANT AND CONFORMABLE AND HANDLEABLE, COHERENT DEHYDRATED GYPSUM SHEET TO THE AREA TO BE SURFACED, AND WETTING THE SHEET TO HYDRATE THE DEHYDRATED GYPSUM AND SET THE SHEET INTO A HARD, RIGID SURFACE.
Claim 2
Independent Claim
139 words
THE METHOD OF APPLYING A COHERENT, HYDRATION SETTING GYPSUM SHEET COMPRISING FORMING A DILUTE AQUEOUS SLURRY WITH APPROXIMATELY 20 TO 40 PARTS BY WEIGHT OF ASBESTOS FIBER AND APPROXIMATELY 60 TO 80 PARTS BY WEIGHT OF PARTICULATE GYPSUM SUBSTANTIALLY ALL SIZED LESS THAN ABOUT 250 MICRONS IN DIAMETER, CONSOLIDATING THE SOLIDS OF THE SLURRY INTO A COHERENT SHEET BY FILTERING, DRYING THE CONSOLIDATED SHEET AT TEMPERATURES WITHIN THE APPROXIMATE RANGE OF 300 TO 375*F. FOR A PERIOD OF ABOUT 1/2 TO 6 HOURS TO DEHYDRATE THE GYPSUM, REMOVING AT LEAST ABOUT 50% BY WEIGHT THEREOF OF ITS COMBINED WATER OF CRYSTALLIZATION, APPLYING AND CONFORMING THE RESULTING PLIANT AND CONFORMABLE AND HANDLEABLE, COHERENT DEHYDRATED GYPSUM SHEET TO THE AREA TO BE SURFACED, AND WETTING THE SHEET TO HYDRATE THE DEHYDRATED GYPSUM AND SET THE SHEET INTO A HARD, RIGID SURFACE.
References Cited (Backward Citations)
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US2744022A
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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) | 1970-03-27 | 1970-09-26 | 1971-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-27 | 1974-09-26 | 1975-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-27 | 1978-09-26 | 1979-03-28 | $7700.00 | Window Closed / Lapsed |