Patent US3274309A successfully refreshed from Google Patents.
US3274309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing building elements and especially building stones of sintered material or the like
Assignee: Individual
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Filing: 1965-06-01
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Granted: 1966-09-20
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Expires: 1985-06-01
Abstract
No abstract record available.
Inventors
- 👤 Schreieck Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:42
CPC Classifications
B; B28; B28B; B28B13/00; B28B13/02; B28B13/0215; B28B13/023; B28B17/00; B28B17/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
THE METHOD OF PRODUCING LIGHT-WEIGHT BUILDING ELEMENTS OF PREDETERMINED SIZE AND SHAPE AND OF CELLULAR STRUCTURE BY MOLDING GRANULATED BLOATED MINERAL MATERIAL AFTER HEATING SAID MATERIAL TO A STATE WHEREIN THE INTERIOR OF THE GRANULES IS BLOATED WHILE THEOUTER SURFACE IS PLASTICIZED, COMPRISING THE STEPS OF FEEDING A BATCH OF UNBLOATED GRANULATED MATERIAL INTO A REACTION CHAMBER INTRODUCING A STREAM OF HOT GAS INTO THE CHAMBER, INTRODUCING A STREAM OF HOT GAS INTO THE CHAMBER, MAINTAINING THE GRANULES OF THE BATCH IN SUSPENSION IN THE STREAM OF HOT GAS UNTIL THE GRANULES REACH THE STATE IN WHICH THE INTERIOR IS BLOATED AND THEOUTER SURFACE PLASTICIZED, ARRESTING THE FLOW OF THE STREAM OF HOT GAS INTO SAID REACTION CHAMBER, WITHDRAWING THE BLOATED BATCH FROM SAID REACTION CHAMBER, IMMEDIATELY FILLING THE BLOATED GRANULES OF THE BATCH INTO AT LEAST ONE MOLD OF PREDETERMINED SIZE AND SHAPE, COMPACTING THE GRANULES WITHIN SAID MOLD FOR INCREASING THE DENSITY OF THE MOLDED MATERIAL, COOLING THE MOLDED MATERIAL TO A STABLE CONDITION AND REMOVING THE THUS PRODUCED LIGHT-WEIGHT BUILDING ELEMENT FROM THE MOLD.
Claim 2
Independent Claim
177 words
THE METHOD OF PRODUCING LIGHT-WEIGHT BUILDING ELEMENTS OF PREDETERMINED SIZE AND SHAPE AND OF CELLULAR STRUCTURE BY MOLDING GRANULATED BLOATED MINERAL MATERIAL AFTER HEATING SAID MATERIAL TO A STATE WHEREIN THE INTERIOR OF THE GRANULES IS BLOATED WHILE THEOUTER SURFACE IS PLASTICIZED, COMPRISING THE STEPS OF FEEDING A BATCH OF UNBLOATED GRANULATED MATERIAL INTO A REACTION CHAMBER INTRODUCING A STREAM OF HOT GAS INTO THE CHAMBER, INTRODUCING A STREAM OF HOT GAS INTO THE CHAMBER, MAINTAINING THE GRANULES OF THE BATCH IN SUSPENSION IN THE STREAM OF HOT GAS UNTIL THE GRANULES REACH THE STATE IN WHICH THE INTERIOR IS BLOATED AND THEOUTER SURFACE PLASTICIZED, ARRESTING THE FLOW OF THE STREAM OF HOT GAS INTO SAID REACTION CHAMBER, WITHDRAWING THE BLOATED BATCH FROM SAID REACTION CHAMBER, IMMEDIATELY FILLING THE BLOATED GRANULES OF THE BATCH INTO AT LEAST ONE MOLD OF PREDETERMINED SIZE AND SHAPE, COMPACTING THE GRANULES WITHIN SAID MOLD FOR INCREASING THE DENSITY OF THE MOLDED MATERIAL, COOLING THE MOLDED MATERIAL TO A STABLE CONDITION AND REMOVING THE THUS PRODUCED LIGHT-WEIGHT BUILDING ELEMENT FROM THE MOLD.
References Cited (Backward Citations)
US3056184A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |