Patent US2881699A successfully refreshed from Google Patents.
US2880100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods for the manufacture of light-weight concrete
Assignee: Casius Corp Ltd
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Filing: 1952-10-06
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Granted: 1959-03-31
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Expires: 1972-10-06
Abstract
No abstract record available.
Inventors
- 👤 Ulfstedt Leo Torsten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:35
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE PROCESS OF MANUFACTURING POROUS LIGHT-WEIGHT CONCRETE WHICH COMPRISES: FORMING A RAW MATERIAL MIXTURE CONTAINING INORGANIC BINDERS HAVING A HIGH CONTENT OF LIME, FINELY DIVIDED SILICEOUS MATERIAL, WATER AND A POROSITY PRODUCING AGENT, AND ADDING TO SAID AQUEOUS RAW MATERIAL MIXTURE A SMALL AMOUNT OF A FINELY DIVIDED HYDRAULIC CEMENTITIOUS MATERIAL ALREADY BEING IN AN ADVANCED STATE OF HYDRATION, IN ORDER TO PRODUCE A RAPID HARDENING OF THE MASS.
Claim 2
Dependent Claim
69 words
THE PROCESS OF MANUFACTURING POROUS LIGHT-WEIGHT CONCRETE WHICH COMPRISES: FORMING A RAW MATERIAL MIXTURE CONTAINING INORGANIC BINDERS HAVING A HIGH CONTENT OF LIME, FINELY DIVIDED SILICEOUS MATERIAL, WATER AND A POROSITY PRODUCING AGENT, AND ADDING TO SAID AQUEOUS RAW MATERIAL MIXTURE A SMALL AMOUNT OF A FINELY DIVIDED HYDRAULIC CEMENTITIOUS MATERIAL ALREADY BEING IN AN ADVANCED STATE OF HYDRATION, IN ORDER TO PRODUCE A RAPID HARDENING OF THE MASS.
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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) | 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 |