US3449141A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Effect of cryolite on calcium silicate compositions
Assignee: Johns Manville Corp
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Filing: 1968-08-08
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Granted: 1969-06-10
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Expires: 1988-08-08
Abstract
No abstract record available.
Inventors
- 👤 Mark E Binkley
- 👤 Osborn Ayers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:58
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/18; C04B2111/00; C04B2111/20; C04B2111/28; C04B2111/34
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
67 words
AN IMPROVED HIGH TEMPERATURE RESISTANT COMPOSITION WITH AN INTEGRATING STRUCTURAL MATRIX OF HYDROTHERMALLY REACTED, HYDRATED CALCIUM SILICATE PRODUCTS OF LIME AND SILICA HAVING INCREASED RESISTANCE TO SHRINKAGE AT HIGH TEMPERATURES AND REDUCED HYGROSCOPIC MOISTURE REGAINED, SAID INSULATING PRODUCT COMPRISING A SELF-SUPPORTING, INTEGRATING STRUCTURAL MATRIX OF HYDRATED CALCIUM SILICA CONSISTING OF THE HYDROTHERMAL REACTION PRODUCT OF AUTOCLAVING A WET ADMIXTURE CONSISTING ESSENTIALLY, IN APPROXIMATE PERCENTAGES BY WEIGHT OF:
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-09 | 1972-12-09 | 1973-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-09 | 1976-12-09 | 1977-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-09 | 1980-12-09 | 1981-06-10 | $7700.00 | Window Closed / Lapsed |