Patent US3202522A successfully refreshed from Google Patents.
US3202522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cementitious product
Assignee: Johns Manville Corp
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Filing: 1961-12-28
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Granted: 1965-08-24
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Expires: 1981-12-28
Abstract
No abstract record available.
Inventors
- 👤 Yang Julie Chi-Sun
- 👤 Elburt F Osborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:15
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02; C04B28/04; C04B28/18; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91; Y10; Y10S; Y10S264/00; Y10S264/43
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A FIBER REINFORCED, CEMENTITIOUS ARTICLE OF MANUFACTURE OF THE MONOLITHIC, HYDROTHERMAL REACTION PRODUCT OF AUTOCLAVING A HYDRATED MASS OF AN ADMIXTURE CONSISTING ESSENTIALLY OF: (A) APPROXIMATELY 12.5%-8.5% BY WEIGHT OF GROUND GRANULATED BLASST FURNACE SLAG HAVING A CRYSTALLINE CONTENT OF LESS THAN ABOUT 15% BY WEIGHT THEREOF, (B) APPROXIMATELY 0.25%-32% BY W EIGHT OF CALCIUM SILICATE HAVING A WATER SOLUBILITY PROVIDING AT LEAST 0.1 GRAM OF CAO PER LITER AND AT LEAST 2 MOLS OF CAO PER MOL OF SIO2. (C) APPROXIMATELY 0%-75% BY WEIGHT OF SILICA, AND (D) APPROXIMATELY 0-27.5% BY WEIGHT OF CALCIUM SULFATE., (E) WITH REINFORCING INORGANIC FIBER DISPERSED THROUGHOUT SAID ADMIXTURE IN AMOUNT OF APPROXIMATELY 5%-50% BY WEIGHT THEREOF, AT PRESSURES OF AT LEAST APPROXIMATELY 50 P.S.I.G. UP TO APPROXIMATELY 600 P.S.I.G. FOR PERIODS OF AT LEAST ABUT 2 HOURS UP TO ABOUT 36 HOURS VARYING PROPORTIONATELY WITH THE PRESSURE.
Claim 2
Dependent Claim
144 words
A FIBER REINFORCED, CEMENTITIOUS ARTICLE OF MANUFACTURE OF THE MONOLITHIC, HYDROTHERMAL REACTION PRODUCT OF AUTOCLAVING A HYDRATED MASS OF AN ADMIXTURE CONSISTING ESSENTIALLY OF: (A) APPROXIMATELY 12.5%-8.5% BY WEIGHT OF GROUND GRANULATED BLASST FURNACE SLAG HAVING A CRYSTALLINE CONTENT OF LESS THAN ABOUT 15% BY WEIGHT THEREOF, (B) APPROXIMATELY 0.25%-32% BY W EIGHT OF CALCIUM SILICATE HAVING A WATER SOLUBILITY PROVIDING AT LEAST 0.1 GRAM OF CAO PER LITER AND AT LEAST 2 MOLS OF CAO PER MOL OF SIO2. (C) APPROXIMATELY 0%-75% BY WEIGHT OF SILICA, AND (D) APPROXIMATELY 0-27.5% BY WEIGHT OF CALCIUM SULFATE., (E) WITH REINFORCING INORGANIC FIBER DISPERSED THROUGHOUT SAID ADMIXTURE IN AMOUNT OF APPROXIMATELY 5%-50% BY WEIGHT THEREOF, AT PRESSURES OF AT LEAST APPROXIMATELY 50 P.S.I.G. UP TO APPROXIMATELY 600 P.S.I.G. FOR PERIODS OF AT LEAST ABUT 2 HOURS UP TO ABOUT 36 HOURS VARYING PROPORTIONATELY WITH THE PRESSURE.
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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) | 1968-08-23 | 1969-02-22 | 1969-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-23 | 1973-02-22 | 1973-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-23 | 1977-02-22 | 1977-08-24 | $7700.00 | Window Closed / Lapsed |