Patent JPS43685Y1 successfully refreshed from Google Patents.
US3701671A
Expired / Lapsed
US
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Masonry materials and method of making the same
Assignee: Tekology Corp
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Filing: 1970-07-01
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Granted: 1972-10-31
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Expires: 1990-07-01
Abstract
Abstract A UNIQUE MINERAL FOUND IN THE SUBSOIL OF THE BAHAMA ISLANDS WAS FOUND TO YIELD HIGH QUALITY MASONRY PRODUCTS IN FORM OF BRICKS, BLOCKS AND TILES WHEN CRUSHED TO PARTICLE SIZES RANGING FROM 8 MESH TO DUST AND REACTED WITH A HYDRAULIC CEMENT AND WATER AND MOLDED UNDER PRESSURE OF AT LEAST 500 P.S.I. TO REDUCE MOISTURE ABSORPTION TENDENCY OF THE MASONRY PRODUCTS MADE FROM THE BAHAMA MINERALS, THESE MAY IN PART BE SUBSTITUTED WITH SILICON SAND OR BAHAMIAN DREDGED SAND. TO INCREASE THE GREEN STRENGTH OF THE PRODUCTS, THE WATER OF HYDRATION MAY CONTAIN UPWARD OF 5 PERCENT OF A MINERAL CHLORIDE.
Inventors
- 👤 Helmer L Blengsli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:45
CPC Classifications
C; C04; C04B; C04B14/00; C04B14/02; C04B14/26; C04B14/28; C04B28/00; C04B28/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |