US2803556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of building materials of the concrete type
Assignee: Skovde Gasbetong AB
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Filing: 1953-07-16
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Granted: 1957-08-20
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Expires: 1973-07-16
Abstract
No abstract record available.
Inventors
- 👤 Carlsson Bengt Orvar
- 👤 Eisner Franz Ferdinand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:40
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/02; C04B20/026; C04B28/00; C04B28/02; C04B28/021; C04B28/18; C04B40/00; C04B40/0028; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
IN AND FOR THE MANUFACTURE OF STREAM HARDENED CONCRETE, INCLUDING LIGHTWEIGHT CONCRETE, FROM AN AQUEOUS PULP CONTAINING A MAJOR PORTION OF FLY ASH MATERIAL AND A MINOR PORTION OF AT LEAST ONE CALCAREOUS MATERIAL OF THE GROUP CONSISTING OF UNSLAKED LIME, SLAKED LIME, HYDRAULIC CEMENT, AND BLAST FURNACE SLAG, THE PROPORTIONS OF SAID MATERIALS BEING 76-85% BY WEIGHT OF THE FLY ASH AND 24-15% OF CALCAREOUS MATERIAL, THE METHOD COMPRISING THOROUGHLY GRIDING IN THE DRY STATE A MIXTURE OF SAID FLY ASH MATERIAL AND AT LEAST THE LIME COMPONENTS OF SAID GROUP OF CALCAREOUS MATERIAL UNTIL 95-99.9% OF THE THUS GROUND MATERIAL PASSES A SCREEN HAVING A MESH APERTURE OF 0.063 MILLIMETER, AND ADDING WATER TO THE MIXTURE SO GROUND.
Claim 2
Dependent Claim
120 words
IN AND FOR THE MANUFACTURE OF STREAM HARDENED CONCRETE, INCLUDING LIGHTWEIGHT CONCRETE, FROM AN AQUEOUS PULP CONTAINING A MAJOR PORTION OF FLY ASH MATERIAL AND A MINOR PORTION OF AT LEAST ONE CALCAREOUS MATERIAL OF THE GROUP CONSISTING OF UNSLAKED LIME, SLAKED LIME, HYDRAULIC CEMENT, AND BLAST FURNACE SLAG, THE PROPORTIONS OF SAID MATERIALS BEING 76-85% BY WEIGHT OF THE FLY ASH AND 24-15% OF CALCAREOUS MATERIAL, THE METHOD COMPRISING THOROUGHLY GRIDING IN THE DRY STATE A MIXTURE OF SAID FLY ASH MATERIAL AND AT LEAST THE LIME COMPONENTS OF SAID GROUP OF CALCAREOUS MATERIAL UNTIL 95-99.9% OF THE THUS GROUND MATERIAL PASSES A SCREEN HAVING A MESH APERTURE OF 0.063 MILLIMETER, AND ADDING WATER TO THE MIXTURE SO GROUND.
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) | 1960-08-19 | 1961-02-18 | 1961-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-08-19 | 1965-02-18 | 1965-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-08-19 | 1969-02-18 | 1969-08-20 | $7700.00 | Window Closed / Lapsed |