Patent US1707550A successfully refreshed from Google Patents.
US2880101A
Expired / Lapsed
US
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Manufacture of steam-cured light-weight concrete
Assignee: Internationella Siporex AB
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Filing: 1956-05-28
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Granted: 1959-03-31
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Expires: 1976-05-28
Abstract
No abstract record available.
Inventors
- 👤 Ulfstedt Leo Torsten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:11
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/18; C04B28/02; C04B28/04; Y; Y02; Y02P; Y02P40/00; Y02P40/60; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
IN THE MANUFACTURE OF STEAM-CURED LIGHT-WEIGHT CONCRETE BODIES, THE PROCESS WHICH COMPRISES FORMING A CONCRETE MIXTURE COMPRISING A FINELY DIVIDED MINERAL BINDER WITH A HIGH CONTENT OF LIME , A FINELY DIVIDED SILICEOUS MATERIAL ADAPTED TO CHEMICALLY REACT WITH THE LIME TO FORM CALCIUM HYDROSILICATES, POROSITY PRODUCING AGENT AND WATER, AND INCORPORATING WITH SAID CONCRETE MIXTURE A FINELY DIVIDED SLOW HYFRATING MAGNESIA BURNT AT A TEMPERATURE OF AT LEAST 900* C. AND HAVING A FINENESS CORRESPONDING TO A SPECIFIC SURFACE WITHIN THE RANGE 10005000 CM.2/G. IN AN AMOUNT OF ABOUT 0.5% TO 10% BY WEIGHT, BASED ON THE SOLID COMPONETS OF THE CONCRETE MIXTURE, TO PREVENT FORMATION OF CRAKS IN THE CONCRETE BODIES IN THE STEAM-CURING OPERATION.
Claim 2
Dependent Claim
117 words
IN THE MANUFACTURE OF STEAM-CURED LIGHT-WEIGHT CONCRETE BODIES, THE PROCESS WHICH COMPRISES FORMING A CONCRETE MIXTURE COMPRISING A FINELY DIVIDED MINERAL BINDER WITH A HIGH CONTENT OF LIME , A FINELY DIVIDED SILICEOUS MATERIAL ADAPTED TO CHEMICALLY REACT WITH THE LIME TO FORM CALCIUM HYDROSILICATES, POROSITY PRODUCING AGENT AND WATER, AND INCORPORATING WITH SAID CONCRETE MIXTURE A FINELY DIVIDED SLOW HYFRATING MAGNESIA BURNT AT A TEMPERATURE OF AT LEAST 900* C. AND HAVING A FINENESS CORRESPONDING TO A SPECIFIC SURFACE WITHIN THE RANGE 10005000 CM.2/G. IN AN AMOUNT OF ABOUT 0.5% TO 10% BY WEIGHT, BASED ON THE SOLID COMPONETS OF THE CONCRETE MIXTURE, TO PREVENT FORMATION OF CRAKS IN THE CONCRETE BODIES IN THE STEAM-CURING OPERATION.
References Cited (Backward Citations)
GB190326478A
Cited
US1863990A
Cited
GB417469A
Cited
US2215812A
Cited
GB502780A
Cited
GB648407A
Cited
US2598981A
Cited
GB688483A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-30 | 1962-09-29 | 1963-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-30 | 1966-09-29 | 1967-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-30 | 1970-09-29 | 1971-03-31 | $7700.00 | Window Closed / Lapsed |