Patent US2650171A successfully refreshed from Google Patents.
US2650171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making lightweight coated aggregate granules
Assignee: Individual
•
Filing: 1950-02-25
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Granted: 1953-08-25
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Expires: 1970-02-25
Abstract
No abstract record available.
Inventors
- 👤 Cecil F Schaaf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:18
CPC Classifications
C; C04; C04B; C04B20/00; C04B20/10; C04B20/12; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
A METHOD OF PROCESSING A LIGHTWEIGHT AGGREGATE FOR USE IN CONCRETE MIXTURES, CONSISTING IN MIXING AN ARTIFICIAL LIGHTWEIGHT SILICEOUS AGGREGATE OF THE GROUP CONSISTING OF WELL BURNED CINDERS, BURNED CLAY AND BLAST FURNACE SLAG WITH COARSE VERMICULITE, COATING THE PARTICLES TO BE FICIAL LIGHTWEIGHT SILICEOUS AGGREGATE WITH A FILM OF RESIDUAL FUEL OIL HAVING A SPECIFIC GRAVITY OF FROM 7.4 TO 8.8 TO CAUSE SAID PARTICLES TO BE IMPREGNATED, APPLYING PORTLAND CEMENT TO THE THUS COATED PARTICLES AND FINALY ALLOWING SAID PORTLAND CEMENT TO DRY TO FORM A HARD, THIN, SHELL-LIKE COATING ON THE EXTERNAL SURFACES OF SAID LIGHTWEIGHT ARTIFICIAL AGGREGATE PARTICLES, SAID PORTLAND CEMENT BEING WETTED BY THE MOISTURE IN THE PORES OF THE AGGREGATE MIXTURE WHICH IS EXPELLED BY THE FUEL OIL IMPREGNATION, SAID CEMENT BEING SET BY SAID EXPELLED MOISTURE.
Claim 2
Independent Claim
133 words
A METHOD OF PROCESSING A LIGHTWEIGHT AGGREGATE FOR USE IN CONCRETE MIXTURES, CONSISTING IN MIXING AN ARTIFICIAL LIGHTWEIGHT SILICEOUS AGGREGATE OF THE GROUP CONSISTING OF WELL BURNED CINDERS, BURNED CLAY AND BLAST FURNACE SLAG WITH COARSE VERMICULITE, COATING THE PARTICLES TO BE FICIAL LIGHTWEIGHT SILICEOUS AGGREGATE WITH A FILM OF RESIDUAL FUEL OIL HAVING A SPECIFIC GRAVITY OF FROM 7.4 TO 8.8 TO CAUSE SAID PARTICLES TO BE IMPREGNATED, APPLYING PORTLAND CEMENT TO THE THUS COATED PARTICLES AND FINALY ALLOWING SAID PORTLAND CEMENT TO DRY TO FORM A HARD, THIN, SHELL-LIKE COATING ON THE EXTERNAL SURFACES OF SAID LIGHTWEIGHT ARTIFICIAL AGGREGATE PARTICLES, SAID PORTLAND CEMENT BEING WETTED BY THE MOISTURE IN THE PORES OF THE AGGREGATE MIXTURE WHICH IS EXPELLED BY THE FUEL OIL IMPREGNATION, SAID CEMENT BEING SET BY SAID EXPELLED MOISTURE.
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) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |